If you have a headache, most likely you're dehydrated. Try making that noggin' stop throbbin' by drinking a couple tall glasses of water. The pain will probably be gone before the ibuprofen would have kicked in. Likewise, if you're feeling like a cranky old hag you might do well to eat something before you flip out and go loco in line at the gas station. Yeah, I know, everybody's on a diet. But part of “watching what you eat” means watching that you eat. Grab a Power Bar at the convenience store. Put a bunch of bananas on your desk every Monday morning. Stick some yogurt in the office fridge. Me, I rarely have this problem because I am constantly snacking. One warning: snacking all day long on Doritos and Hershey's Kisses will give you a caboose Amtrak would envy. Believe me, I know. But it's easy to control what you snack on if you shop for the stuff after lunch. Try picking up some snap peas, baby carrots, beef jerky or Cheerios. Candy bars and other super sugary snacks will only make you crash worse later. Eat protein or a small amount of carbs and you'll satisfy those mid-meal cravings while doing the body some good. Plus, you'll spare yourself the agony of a low-blood sugar-induced midday shitfit.