If your recording to a click, make sure your drummer is comfortable with is and doesn't even have to think about it, theres nothing worse than a drummer saying they can, and when you get there theyy just can't do is and the drums come out sounding all tense.
Another tip, know the songs inside out! Don't want your mind going blank when the red light goes on.
I think the crappy thing to say is that time is money, every little mistake you or the band make, costs whoever is paying, less time so more money wasted.
Me and my band recorded Drums, Bass, Scratch Keys & Scratch vocals together.
We then deleted the vocals and keys, then re recorded them over the top, then added guitar. You can hear the outcomes on www.myspace.com/tenfloors
In the end though, the main thing is to enjoy it, and don't let tension build up, you cant record when your all tense and having friction with other band members.
-Jake