Yeah - caffeine, or any stimulant works a HECK of a lot better with fuel to burn - and "long term" stores (aka your body fat) doesn't really cut it - basically you need to ingest either some carbs, or sugars (or a mix of both) to give the caffeine to work with. So have a slice of bread, or a Clif Bar, or just dump a bunch of sugar and milk in your coffee

I've actually thought of asking my MD to wirte me a scipt for some provigil. I actually have real sleep issues that can actually make me droze off at times, sometimes while doing important tasks