Caffeine in the AM a strong coffee is a diuretic and will empty you out. Colon and all.
Do cardio only if you exercise. You do any lifting and you will be building muscle.
Drink lots of water or green tea. You can't go says without water... LOLOLOL that is a good way to die.
Your breath is going to reek... make sure you don't chew gum with no food the acid will damage your stomach and esophagus.