Visitor looking for tips on driving in Houston

I am looking for tips you wish people who were Visiting Houston knew about driving in Houston. Let me know what pisses you off while driving and you see say a Montana plate. I am from Canada but the cities and roads are very similar to Montana. I'll get it started with a few examples of what I'm thinking of.

1. If people are passing you on the right, you are in the wrong lane
2. merge onto the interstate at the speed limit
3. Don't pass the line of people trying to turn and attempt to cut in right near the turn.