1. First and foremost, BE PREPARED.
Make sure you are well rehearsed and everyone knows the part that they are playing. Artist waste more time arguing what the arrangements and dynamics of the song are or should be.
2. The next step is to make sure that everyone has fresh strings, drumheads and sleep (Singer). Go over your equipment to make sure it's all in working order and don't forget you can always rent studio gear if you feel yours is lacking. Just make sure to call ahead and reserve during your upcoming session.
3. You need to have an idea of what your production should sound like. Remember not to overthink it as you might have to recreate for stage and sound.. Just because there are an unlimited amount of tracks and plugins doesn't mean you have to use them all.