1. Office politics. No matter how much you avoid it, as long as there are people, there will *always* be politics. You can't hide from it.
2. It's nice to be helpful and all, but one must *always* weigh the pros and cons of doing so. Don't help someone out if it means giving less attention to something you ought to be focusing on. Help only when you really have extra time / resources to spare.
3. Make sure that you cover your ass in everything you do.
4. Always do the best you can in whatever job that's been given to you so that people know that you're giving it your all. Even if you make a mistake or weren't the best person ever employed to do it, you can't fault someone who is doing their best and wanting to learn how to do it better.
I'm sure there are more but I'm gonna nap. Heehee.