A good place to share tips and tricks is Adobe’s Flex Cookbook. Adobe produces the site in cooperation with O’Reilly. Here are some of mine:

- Object-oriented game-style animation using libAnim2D [demo here]
- Preview a PDF inside your AIR application
- CPreferencesManager : A preferences manager for AIR
- Executing several SQL statements with one instance of SQLStatement

For my posts, I received a free printed issue of Flex 3 Cookbook from Adobe as a gift! Thx, nice idea!