I usually run 400-600mg/day for 3-4 weeks as a cutter before a recomp cycle, just drink 1 gallon of h20 every day(minimum) take vit C, vit E, ALA, and drink 1 V8 a day. If your getting head aches and feeling totally lethargic, more than likely cuz dehydration/glycogen stores are too low, in that situation mix 4-6 tablespoons of glycerol with some emergenC in a gallon water jug and drink that throughout the day, should make a guy feel a lot better!
It all depends on your work setting I guess, even though it is hot as hell outside, I work in my own climate controlled office on remote drilling locations, lucily I can set the T-stat to 58* let the A/C run all day, and throw a fan on me when/if I get too hot