Any of the tapes can be used on an onging basis for short term goal. Like lifting your self esteem before a meeting... yes by all means use the self esteem supercharger for that. Relaxation for the sake of relaxation. yes! Personal Genius for the sake of thinking better, coming up with the right words for a meeting or even photoreading,yes. You'll notice that they are all usually subgoals that help you get to your main goal. If you want to listen to a 4th or 5th tape during a day thats fine. the point is you need a life in the physical realm not just in the head

so you're not likely to want to listen to 5 paraliminals in a day every day.
Play with it just make sure that you give them time to work as well as giving yourself a minimum of 20minutes between paraliminals.
Basically all the tapes can be played for a week or a few times until you feel comfortable. Mostly you'll feel a sense of satiety when you've listened enough for a while. When you feel that you are getting frustrated or annoyed with the tapes it time to give it a break. Perhaps from all self improvment tapes or just the one you're currently working with. By giving it a break I mean stepping back and noticing what is happening in your life.
Alex