The Quick Links lab is very useful to set up quick access to each of your Mail Setting tabs.
If you often find yourself checking mail settings, such as labels or filters, this tip will save you at least a few mouse clicks. Normally you would go to Mail Settings but that takes a couple of clicks at least. There is a quicker way.
First enable the Quick Links lab - this will add a Quick Links section to your left hand menu. Then use the usual way to get to Mail settings (or any of the setting tabs that you use often). Now use the Quick Links add button. This will take the URL in the address bar and create the Quick Links shortcut to whichever tab you are clicked on. Now any of the setting tabs you use are just a single click away.