What the best way keep the hand free from contamination

Always wash them after doing something that could contaminate it always use soap or if there is no soap use germ ex 

Because without physical activity, the body has extra "energy" if you will, and so when it is time for bed you are not tired, so you end up staying up all night. also there is probably an effect on your internal clock, which messes with your melatonin production which goes hand in hand with your sleep cycle