Right Thinking Girl's list,
How To Be A Happy Woman (via baldilocks, who knows about these things), is a must-read. On the list,

4. Break up with a guy you like but isn't good for you.

5. Don't give in, no matter how painful, if your principles are at stake
. . .
13. Know when to listen and when not to listen.
. . .
16. Do not ever let a man tell you how to drive, dress, think or walk. (so much for What Not To Wear, American version

My favorite is,

12. Only buy really good, high-quality handbags

(which is why I bought Coach stock a couple of years ago), and its corollaries, wear matching shoes, and get the best coat you can afford.