Pete Freitag has whipped up 20 CSS Tips and Tricks:
- Rounded Corners
- Rounded Corners without images
- Creating a Netflix style star ratings
- Tableless forms
- Styling Lists with CSS
- 2 Column Layout Technique
- 3 Column Layout with CSS
- 3 Column Fixed width centered layout
- Printing with CSS
- Adding a CSS stylesheet to an RSS feed
- Footer Stick
- CSS Element Hover Effect
- Styling Horizontal Rules
- Clearing Floats
- CSS Popups
- Box Punch
- CSS Badge
- Orange RSS Buttons with pure CSS
- 10 CSS Tricks you may not know
- 10 More CSS Tricks you may not know
Are there any other helpful CSS tricks that you use? | 
