Before starting the recording proccess there are a few rules in order to avoid
  some unpleasant situations...

  1.Fisrt of all Know what songs you will be recording. Doing so will save you
     time in the studio.Rehearsing while a recording session is a little costly

  2.Know your songs.Know exactly what you`re gonna write,overdubs,solos,fill
     parts texture instruments.Doing so will allow you to sing and play with
     more feeling and excitement resulting in a better project.
     This avoids back steping too!

  3.List your songs. Make a list of the songs in the order you would like them to
     appear on the CD and we will work towards that

  4.Day of Session. Come to the studio little earlier,check your gear before
     recording:tuning,new strings,electonics and other things that`ll waste
     session time while fixing

  5.Do not bring anyone uneeded in the session that will cause distraction
     interruptions and noise!!You will waste extreme amounts of time hanging
     out with your friends while recording.
     In the mix proccess:No one else except the band or band producer!

  there are also some other things to be considered beyond these 5 simple
  rules.Things that must be taken care off while writting the songs that
  affect their final sound.Don`t forget:A recording is nothing more than the
  reproduction of a band`s existing sound.If there`s a mistake in the parts of a
  song (wrong note,wrong chord, unsufficient consistency) whatever `magic trick`
  we `ll do in the mix,the mistake will be visible to anyone who knows..

  Another issue is tecnique and playng ability.Maybe this is the most important
  factor in the hole recording universe!:For a recording to sound big, it must be
  played big. Untightness will dramatically reduce the size of the recording. If the
  kick drum and bass guitar lock up properly, the result is a huge tone greater
  than the sum of their parts!! 
  If everyone knows their part the recording will sound 10 times better.
  The recording will go quicker, you'll save money, and you'll have more
  time experiment.(this is known also as the wall of sound)

  there`s more info on `recording preperations` for seperate instruments: