These exercises will help you to increase syncronisation between left and right brain hemispheres, which in turn will have a postive effect on things like creativity, imagination, listening, following directions etc. The exercises are very easy to use and takes only a few minutes to do. They work instantly. You can use the exercises at home as preparation in the days before the session. There are several techniques that can be used. I list a few of them below.
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BRAIN BUTTONS:
Rest one hand over your navel.
With the thumb and fingers of the other hand, feel for the two hollow areas under the collarbone, about one inch out from the centre of the chest.  Rub these areas vigorously for 30 seconds to one minutes, as you look from left to right.

** This stimulates the carotid arteries which supply freshly oxygenated blood to the brain.  They help re-establish directional messages from parts of the body to the brain, improving reading, writing, speaking and the ability to follow directions.

 

CROSS-CRAWL:
Standing up, “march” in place, alternately touching each hand to the opposite knee.

Continue during the course of four to eight complete, relaxed breaths.

**  This exercise is wonderful for improving reading, listening, writing and memory.  It co-ordinates the whole brain.

 

LAZY EIGHTS:
Extend one arm straight out in front of you, with the thumb pointing toward the ceiling.  In the air, smoothly and slowly trace the shape of a large figure 8 on its side.

As you draw the 8, focus your eyes on your thumb, keeping your head upright, facing forward and moving only slightly.  Start tracing your 8 by beginning at eye level.  Move your arm up and over to the left, around and back to centre, then to the right.

Do three full 8s with one hand, then three with the other and finally three with both hands clasped together.

** This integrates both visual fields, improving balance and co-ordination. Many people report better vision after this exercise.

 

More brain exercises could be found here