Man, those are the old man method of staying awake....next they will be telling you to wear tube socks to keep blood pressure up in the lower limbs, so rendering them less tired, or meditating!
Well, for me - its caffine. Sure there maybe a down to it, but i am waiting for that to hit, and i have been guzzlin the stuff for years
. Keep it perpetual and it works wonders.
OR - try not to stare too hard at things, it tires the eyes - like computer screens
Back to old man methods.....pah!
Move about a bit, sitting still can lead to feeling "tired" - go for a brisk walk, or even do excerise if in the long run!
Breathe fresh air - a must. You will feel tired if cramped in a room all day doing sod all - get out, get active, and get moving. Wakes you up until its a natural bed time.
Bottom line - don't sit on your butt all day and get the circulation going - it does work! You fall asleep sat in a chair - i have never heard of someone falling asleep whilst walking