try bits of candy for a short boost, caffeine pills if absolutely needed, but stay active! most important part of staying awake on graves.
It Works for me.
I like the new berry rush flavor.
Never done graveyard shift, considering I'm 15, but I challenged my mate at staying up for a whole week, he lasted three days, I lasted the whole 7. Whenever I felt tired I did something to give me a big adrenalin boost, such as jumping a big gap with a big drop, taking a ride with my brother (2.0 litres in a first car = fast and fun). So yeah, do something dangerous/illegal on your break and that'll wake you up
I seriously doubt you stayed up for 7 days straight without so much as napping.