If you don't have a deadline, you might never post your ad. Fifth, post your ad on all the sites recommended by Cupid which are appropriate to your audience. Don't look for a penpal who is a nun on OutPersonals, etc. Sixth, post a photo with your ad. Find one that you like and post it.
Surprises make people nervous.
By posting a photo you eliminate a lot of that nervousness and anxiety that comes with personal ads, and blind dating. Seventh and lastly, monitor your progress. If you're getting no responses consider rewriting the ad. If you didn't post a photograph post one. And if you're posting in a database focused on the wrong audience, post on a more appropriate site.