In Selenium Titbits video series one can learn Selenium tips and tricks starting from most basic to advanced tricks. These titbits sometimes comes very handy while you are starting to look for some interview questions or may be something which act as a handy little trick while doing regular selenium code.

Taking Screenshot in Selenium WebDriver

Explicit and Implicit Wait in Selenium WebDriver

Finding and Working with UI Controls in Selenium

Working with Different Browsers using Selenium Web Driver