Professional associations can be a great source for information about your future career. For most fields, you can find international, regional, state, and even local chapters of working professionals.
Your UNCW department may have recommended professional associations already listed on their department website.You can also ask your instructors what professiona associations they belong to.
A simple Google search for your field and the word association will often yield useful results. For example: sociology association. Because many such professional associations are non-profits, you might also want to limit you search to .org sites. This may result is more useful results. For example: sociology association site:.org. (Learn more about searching within domains in Google).
The Occupational Outlook Handbook, listed above, also often has professional organizations linked on the "More Info" tab for each occupation.
As always when searching the web, be wary and on guard for disreputable sites or small groups masquerading as large, professional associations. Throughly explore the Association's website and also look at what other websites have to say about the Association. Use that information to determine the validity of the Association. When in doubt, ask a librarian or your instructor for assistance.