The therapist will require that you fill out a health history form.  It is list all information so that the therapist can customize a session to your specific needs.  Then the therapist will ask you about areas that you would like worked on or areas that need to be addressed.

Undress to your comfort level.  For a full body massage, most get completely undressed. If it is more comfortable to leave undergarments on that is fine, the therapist will work around the clothing.  The therapist will step out of the room and give you a few minutes to situate yourself comfortably on the table.

Make yourself comfortable!  If the therapist needs you to change positions they will either do it for you or ask you to change position.  Otherwise change positions whenever necessary.

Some people close their eyes and relax, while others prefer to talk.  Do whatever is natural for you.

If you are looking for some occasional relaxation, every 3-6 weeks may be okay for you.  If you are looking to address a specific condition it is suggested to go more frequently and then slowly taper into a maintenance schedule.