There are so many great things you can do with an Ann Friedman Weekly classified. Shamelessly self-promote. Job-hunt or lure new Twitter followers. Shout out your cause or campaign. Get your Kickstarter funded. Say happy birthday to a friend. Offload your unwanted possessions. Find true love. Publish your haiku.
If you're looking for more specific inspiration, here are a few ads that had great click-through rates: