Get use to practicing with a metranome! cannot stress that enough, that caught me with my pants down because i was not use to it. i was getting more distracted trying to listen to the click then my acuall playing. since then i have learned to be one with mr.click and recording has been more or less a brezze since then.
Get it tight! you and your fellow band mates should practice like its going out of style! you have to know what your doing with u get in that padded room especially if its a group recording beacuse one slip up or one mistake and its take one all over again!
and finally try not to let your nervers get to you. the first time i was in the studio i got so frustrated because i couldnt nail some parts. its annoying but like that other dude mentioned recording your guitar first is probaly a good idea.
P.s CAFFINE OR ALCOHOL DO NOT HELP YOU PLAY BETTER!
