pshychological scienticts has figured out that we are aprox 5% more concentrated when we chew (Sorry I dont have any link to any article to back this up).
Research where Twins where given IQ tests, show that the twin that is given bubble gum, and chews during the test, does better on avreage.
So bubble it up during your sessions.
Other good things to do is to drink water, and eat healthy food during sessions(if its a long session)
This is probably comon knowledge, but I post it anyway
