6 Tips to Get Started with Automated Testing
1. Decide what Test Cases to Automate
2. Test Early and Test Often
3. Select the Right Automated Testing Tool
4. Divide your Automated Testing Efforts
5. Create Good, Quality Test Data 
6. Create Automated Tests that are Resistant to Changes in the UI
http://smartbear.com/PDF/6_Tips_for_Automated_Test.pdf