Here's what I've learned about writing a good ad:
1. Before you start writing, put on lipsick. Or a cowboy hat. Or your coolest T-shirt and stilettos. Play your favorite CD. Props that make you feel soulful, frisky, and fascinating help you make those claims for yourself in your ad.
2. It might sound obvious, but be sure to post a terrific photo of yourself. If he likes the photo, he'll read the ad.
3. If you're not comfortable putting your picture up online, avoid overselling your appearance with dubious claims like "Sharon Stone look-alike." I started my magazine personal with: "Curvy, almond-eyed writer, fit (good shoulders)...." My husband says he was attracted to the soft sell of the description and the quirky confidence of the assertion. More to the point: I wanted to attract a man who appreciated subtlety.