1. Just make sure you and your partner are double backed and tied in correctly
2. Communicate with your partner, make sure he/she's belaying you, and vice-versa and shit.
3. Don't repel off the end of your rope, make sure partner doesn't
4. When lowering don't run out of rope, make sure partner doesn't either
5. When setting anchors make sure no American Triangle, and that rope is not run directly thru bolts (I've seen that so many times, its sad really).
5. Smoke Pot = Double check Knot
Follow these 6 rules and You'll be just fine.