This is fairly easy. Simply watch 72 hours of TV straight. The VCR is ok, and so are video games, but theater movies are out. The key is the cathode-ray tube. Be sure to sit close to the set.
Caffeine is totally legal.
This must be done immediately prior to your physical examination for the Armed Forces. Try not to yawn when you get there, but don't resist your urge to make guttural moans. The only disadvantage is that coming off the caffeine buzz is liable to drop you into a coma, but think of all the rock songs you can write. You're going to need to catch something. This can definitely involve some interesting social interactions.