* Don't have any scratches on your skin, or the salty water
    will sting and distract you from the experience.
  
  * Empty your bladder before you enter the tank, so you
    don't feel the need to get out mid-way.

  * Shower before entering and after exiting the tank.

  * Some places can play your choice of music through the
    sound system in the tank, so you might want to bring
    some of your favorite music to experiment with,
    if you like.  If you prefer silence, you might
    want to bring earplugs to minimize outside noises.