There are many opportunities for students who are members of major geological organizations such as those listed below. Students get a membership discount, and more inexpensive tickets to conferences, field trips, and meetings, at which there is always an opportunity for networking with other geologists and even employment! Get yourself out there, find what you love, and get involved!
International Union of Geological Sciences: http://iugs.org/
The IUGS is one of the largest and most active non-governmental scientific organizations in the world, and aims to promote development of the Earth sciences through the support of broad-based scientific studies relevant to the entire Earth system; to apply the results of these and other studies to preserving Earth's natural environment, using all natural resources wisely and improving the prosperity of nations and the quality of human life; and to strengthen public awareness of geology and advance geological education in the widest sense.
American Geological Institute: http://www.agiweb.org/
The AGI is a nonprofit federation that represents more than 120,000 geologists, geophysicists, and other earth scientists. The AGI provides information services to geoscientists, serves as a voice of shared interests, plays a major role in strengthening geoscience education, and strives to increase public awareness of the vital role the geosciences play in society's use of resources, resilience to natural hazards, and the health of the environment.
Geological Society of America: http://www.geosociety.org/
The GSA is a nonprofit organization dedicated to the advancement of the geosciences, the dissemination of geoscience knowledge, and the promotion of geosciences in the service of society. The GSA aims to communicate the importance and relevance of the geosciences in a global context through education and public awareness.
United States Geological Survey: http://www.usgs.gov/
The USGS is a multi-disciplinary science organization that focuses on biology, geography, geology, geospatial information, and water. The USGS is dedicated to the timely, relevant, and impartial study of the landscape, natural resources, and natural hazards.
Geological Association of Canada: http://www.gac.ca/
The GAC is a geoscience community, whose mission is to facilitate the scientific well-being and professional development of its members, the learned discussion of geoscience in Canada, and the advancement, dissemination and wise use of geoscience in public, professional and academic life.
Mineralogical Association of Canada: http://www.mineralogicalassociation.ca/
The MAC is non-profit scientific organization to promote and advance the knowledge of mineralogy and the allied disciplines of crystallography, petrology, geochemistry and mineral deposits.
American Geophysical Union: http://www.agu.org/
The AGU is a worldwide scientific community (academic, government, industry and other venues) that advances an understanding of Earth and space science that is used for the benefit of humanity. The AGU strives for global leadership in the communication of scientific knowledge and to promote the application of this knowledge (and scientific literacy) within and beyond the Earth and space science communities.
American Association of Petroleum Geologists: http://www.aapg.org/
The AAPG is currently the world's largest professional geological society, with membership including geologists, geophysicists, CEOs, managers, consultants, students and academicians. The purpose of the AAPG is to foster scientific research, advance the science of geology, promote technology and inspire high professional conduct.
Society of Petroleum Engineers: http://www.spe.org/
The SPE is a society of professional excellence, not only comprising engineers, providing its members lifelong learning, and continuous personal and professional growth. The mission of the SPE is to collect, disseminate, and exchange technical knowledge concerning the exploration, development and production of oil and gas resources, and related technologies for the public benefit; and to provide opportunities for professionals to enhance their technical and professional competence.
National Association of Geoscience Teachers: http://nagt.org/
The NAGT works to foster improvement in the teaching of the earth sciences at all levels of formal and informal instruction, to emphasize the cultural significance of the earth sciences and to disseminate knowledge in this field to the general public. NAGT supports both educators and students through a variety of awards including the Outstanding Earth Science Teacher award, the Neil Miner award, the James Shea award, summer field programs, and an Outstanding TA award.
National Earth Science Teachers Association: http://www.nestanet.org/
NESTA is a nonprofit 501(c)(3) educational organization made up of and governed by classroom teachers, whose mission is to facilitate and advance excellence in Earth and Space Science education. NESTA's purpose is the advancement, stimulation, extension, improvement, and coordination of Earth Science education at all educational levels.
Association for Women Geoscientists: http://www.awg.org/
The AWG exists to promote the professional development of its members, to provide geoscience outreach to girls, and to encourage women to become geoscientists. Additionally, the AWG strives to exchange educational, technical, and professional information and enhance the professional growth and advancement of women in the geosciences.
National Association for Black Geologists and Geophysicists: http://www.nabgg.com/
The NABGG is a non-profit organization with headquarters in Houston, Texas. Their objectives are to provide and encourage continuing education in the geosciences, to inform minority students of career opportunities which exist in the geosciences, and to encourage minority student by providing financial aid, counseling, assistance in obtaining meaningful summer and permanent employment.
National Speleological Society: http://www.caves.org/
The NSS exists to study, explore, and conserve cave and karst resources; protect access to caves; encourage responsible management of caves and their unique environments; and promote responsible caving. In addition, the NSS provides grants to support cave/karst conservation research and education projects.
Society of Vertebrate Paleontologists: http://www.vertpaleo.org/
The SVP is organized exclusively for educational and scientific purposes, with the objectives of advancing the science of vertebrate paleontology and serving the common interests of all persons concerned with the history, evolution, comparative anatomy, and taxonomy of vertebrate animals, as well as field occurrence, collection, and study of fossil vertebrates and the stratigraphy of the beds in which they are found. The SVP is also concerned with the conservation and preservation of fossil sites.
National Geographic Society: http://www.nationalgeographic.com/
The NGS is one of the largest non-profit scientific and educational institutions in the world. Its interests include geography, archaeology and natural science, the promotion of environmental and historical conservation, and it has supported the efforts of enterprising grantees and groundbreaking explorers. National Geographic's programs support critical scientific research, geographic exploration, and environmental and cultural conservation worldwide through a variety of grants and programs available to all.
Bureau of Land Management: http://www.blm.gov/
The BLM is responsible for carrying out a variety of programs for the management and conservation of resources, as well as subsurface mineral estate on United States public lands, including: energy and minerals; timber; forage; recreation; wild horse and burro herds; fish and wildlife habitat; wilderness areas; and archaeological, paleontological, and historical sites. The mission of the BLM is sustaining the health, diversity, and productivity of the public lands for the use and enjoyment of present and future generations.
National Science Foundation: http://www.nsf.gov/
The NSF is an independent federal agency "to promote the progress of science…” they are the funding source for approximately 20% percent of all federally supported basic college research in many fields such as mathematics, computer science and the social sciences. Funding is issued through limited-term (usually ~3 years) grants, with about 10,000 new awards honored a year.
Even more geological societies can be found listed at: http://geology.com/societies.htm