Recording studios can be a bit of a pressure cooker. I’ve seen arguments break out between life long friends, producers vs artists, artists vs engineers etc
Be cool, be supportive and be friendly. Things can take time in the studio and it gets frustrating but it is also a lot of fun when it’s going great.
Be early. On time is late. Accept you’ll be early and still have to wait a few hours before you do anything, just accept it now and move on.
Make sure everything is working correctly, batteries, cables, instruments intonated and in tune. Things do break but nothing screams like amateur hour when you’ve forgotten to bring all your leads and tuner or whatever.
Know your parts cold but be open to the fact they might well change once things get going but the more time you save the better you get.
Try to be sparing about overdubs and punching in. I’d only say do it if either the engineer or someone asks you or you are truly unhappy with a particulars aspect of it. The more you have to redo a part the more time you have added to the editing process, which already takes time anyway. So again, the more time you can people the better you are doing your job. My aim is to get my part done as quickly as possible to buy them more time later on in the session the singers and multi tracks for guitars/keys etc. If it’s half way through the the session and we are still tracking bass, which is one of the first instruments to get recorded something has gone very wrong.