Common reasons people come into the office/topics to potentially review:
-Abdominal/pelvic pain
-Abnormal bleeding
-Basic infertility issues
-Contraception counseling, placement of contraceptive devices, contraception in patient's with multiple comorbidities etc
-Menopausal symptoms (less likely in a resident clinic, but you do get them from time to time)
-Management of abnormal pap smears
You can use any gyn textbook, uptodate for a quick overview, and ACOG practice bulletins for reading sources, and the ASCCP guidelines for abnormal pap smears
I agree those topics are important. Good website www.acog.org
Also I like 5 minuite clinical consult obgyn you can get for iphone or droid and ofcourse the little red book on obstetrics and gynecology