I came across this list of "what every woman should have/know," and I wholeheartedly agree with almost all of it. The only thing I would change is to make it applicable for every person, not just every woman (with some changes, for example s/black lace bra/sexy underwear that you are willing to wear around someone you find attractive).
Anyway, the list is
here. Edit: What's up with the rich text web-link maker not working in LJ anymore? I mean, links work fine when you make them in html, but it's kind of a pain to do so all the time.