gaining knowldege

have you ever heard of the 'rules for taking tests', like eat a big breakfast, get eight hours of sleep, etc. no where in those rules does it define how you should dtufy, how often, and for what incriments of time. i recently was introuduced to the idea that you if you eat while you study, you should eat while testing. i wonder why this is, and how many other factors could contirbute to your overall test-taking ability? i hope to gain this knowledge through these next few classes, and will definately share it.