What mainly keeps you up during the day?

i know some here struggle staying alert and awake during the day so what mainly keeps you from just wanting to go home and get under your covers?

What mainly keeps you up during the day?
Caffeine
good sleep overnight
food
exercise/working out
a good shower in the morning (warm OR cold)
Power nap mid day
Other
Select gender and age to cast your vote:
What mainly keeps you up during the day?
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