CPD highly recommends joining professional associations in your areas of interest. The student rate for GSA is $45/year, and provides access to news, job and internship postings, mentorship, professional development opportunities, and information on conferences, scholarships, and webinars. Lifetime memberships are available as well.
From the website:
The Geological Society of America (GSA), founded in 1888, is a global scientific society with members from academia, government, and industry in more than 100 countries. Through its meetings, publications, and programs, GSA enhances the professional growth of geoscientists at all career levels, encourages cooperative research among earth, life, planetary, and social scientists, fosters public dialogue on geoscience issues, and promotes the geosciences in the service of humankind. GSA is headquartered in Boulder, Colorado, USA.