CONTRACTS
Cornell University Legal Information Institute
Contains a searchable index of Contract law topics: http://straylight.law.cornell.edu/topics/contracts.html

Free Advice: General Contract Law Questions
http://law.freeadvice.com/general_practice/contract_law/

Graphic Artists Guild Contract Monitor
Tips on reading a contract, understanding it, and creating your own contract to protect your copyrights: http://www.gag.org/contracts/contracts.html

New York Foundation for the Arts Interactive
Helpful, basic information on gallery and collector contracts. Though targeted at New York residents, most information is applicable to all agreements:
http://www.nyfa.org/archive_detail_q.asp?type=6&qid=68&fid=6&year=2000&s=Spring