Here's how to organize your friends list:
1. Click on your name, on the gray navigation bar at the top of your page.
2. Scroll down to your Friends widget.
3. Click the 'Edit' link in the title bar.
You can also decide whether you want 6 friends to show up on your page in random order, or whether you want to choose which friends show up.
Click the "Save" Changes' button at the bottom of the page when you're finished.