1. You don't code to add a feature or whatever. You do it to solve Users' problems. It's a User-centric system.
2. You read more code than you write. So help yourself and write code intended to be read.
3. If people don't know you did something, you did nothing!
4. Never answer a call at 3 am if you're not paid to be on night call-duty. You'll become the guy who answers at 3 am.
5. Remember the big difference between you and me is that I failed to do stuff more times than you have tried to do.
6. When you start shaving the yak, stop!