Have you ever visited the "settings" link in your gmail? If not, do it, now!
Gmail has all sorts of features I never knew existed. For example, you can turn on a feature that lets you retract an email you just sent (only for a few seconds after you hit send though!)
You can set it so after a certain hour at night you have to answer three math problems before you can send the message...so you don't accidentally tell your boss he's a jerk while you are wasted (or whatever, I can't really imagine not being able to answer simple math problems, but hey...)
Best of all you can create a task list that will sit in the corner and remind you of what a time waster you are - emailing your friends while you should be getting your oil changed and what not.
Also you can add your google calendar on the side so you can be reminded of appointments, etc.
You can hit a "take a break" button which will make it so you can't access your email for fifteen minutes. Good if you just are a mindless email checker, like myself.
Anyway. The good folks at google never disappoint me. Unless their map program takes me to the middle of nowhere instead of to the work party at the local ice skating rink. But that was just the one time....