Have you read The Four Agreements?

I found out about this book at one of those beginning of the year teacher conferences. Got it (off half.com) read it, loved it. But I keep forgetting what each of the four agreements are.
I always remember: Let your word be impeccable, and Always do your best, but I always forget about the other two. I know one of them has to do with Hey, it's not about you. Meaning that the things people say that hurt or seem to belittle or otherwise disrespect you, really stem from issues and turmoils within that person and often don't have anything to do with you at all.
Well, I keep the book around so I can always check. Here are all four:
Be impeccable with your word.
Don't take anything personally.
Don't make assumptions.
Always do your best.

This last one often trips me up: when I'm busy being depressed about what other people say or do, I usually wander around and don't at all do my best. I have to keep reminding myself.
Besides! being depressed about what other people say and do violates the middle two: peoples' vitriol aimed at me is more about them than me! Also, I commonly misinterpret what other people mean by making assumptions.

I'm so ineffectual when depressed...