Web sites put up by the individual fellowships have the most up-to-date information. Be sure to check Pomona's internal deadline dates if the fellowship requires nomination by the College.
Consult professors and others with expertise in your area of interest. If interested in graduate work abroad, find out who has studied or lived in the places you want to go.
Selected external links appear below. Use them with care--information may be outdated, and some awards may be available only at specified institutions. Ignore other institutions' internal deadlines; check with the GFO for Pomona's deadlines if the fellowship requires College nomination.
Excellent advice in Why Apply, Personal Statements, Letters of Recommendation sections
These pages focus on UK fellowships, but also include some good general advice. See Writing Your Story, Letters of Recommendation, and candidates' reports
University of Illinois
Searchable database with several search options
U of CA-Davis Office of Graduate Studies
Links to many sources; note that some are post-doctoral only
General advice and fellowships listings
Database organized by field of study and population groups
University of Maryland
Excellent scholarship resources for international students, with links
Worcester Polytechnic Institute
Thoughtful advice, good listings by defined populations; heavy on physical sciences and related fields
Links to other useful sites
Searchable database for grants awarded directly to individuals.
Search by type of award, deadline month, underrepresented group, etc.
Commercial site mostly for undergraduate aid, but has links to other sources
and while you're at it.....
The Career Development Office has relevant advice, and their library includes publications on many sources of funding.
Pomona's Office of Financial Aid has information on many external sources of funding.
Many professional organizations in the academic disciplines (e.g. American Chemical Society, Social Science Research Council) and the professions (e.g. Association of American Medical Colleges) offer fellowships for graduate study or provide links and advice about possible sources of funding.