I tend to be a more positive person, and if you're like me, feeling sorry for yourself tends to get old pretty quickly. This leaves you with a serious challenge if you have a whole day of hours to work through, because feeling sorry for yourself suits that situation quite nicely. But over the years, I've come up with a few little tips on how to make it through when you're just plain tired. I hope you'll find them helpful:
1. Drink water. Frequently. Your body needs it anyway, and it needs it more when you're run-down. Ice water will probably wake you up in the moment, but what it actually does is constrict energy flow, and so it isn't recommended. Drink room-temperature water (unless the room temperature is really high, of course).
2. Move. Get up and move around. Frequently. If you're concerned about how you'll come across to other people, go to the bathroom and do it there.
3. Work a pressure point. There's a pressure point on the palm of your hand, about a fingerbreadth down from the base of your middle finger. Push hard around that area with your thumb (supporting the back of your hand with your other fingers so you can really apply pressure), and you'll find it - it'll be tender. Rub the pressure point with as much pressure as you can handle. You can do this as frequently as you like, on either hand or both.
4. Talk (if you're in a situation where you can). Ask a friend to ask you something where you'll remain engaged in the conversation.
5. Eat lighter foods. Avoid wheat and dairy products, if possible, when you're really tired (or at least go light on them), as they will weigh you down. Vegetables and fruit (not too much fruit) are good. Avoid sugar if possible. And obviously, you don't want to eat a huge meal in the middle of a day you have to stay awake for.
6. Caffeine. If all else fails, there's always coffee! We're merely human after all, right? Tea is good too, but it's good to know the difference between the caffeine in coffee and the caffeine in tea. They have pretty much equal amounts, but the caffeine in tea is longer acting - it takes longer to take effect and lasts longer. The caffeine in coffee will wake you up quicker. Also, for you espresso lovers, there is more caffeine in drip coffee than espresso because of the way the water runs over the beans, so if you're tempted to order that espresso or Americano, think again. One more word about the caffeine - too much will make you jittery, and then you'll just be back at square one. Drink it wisely.
And finally, the best remedy for being tired....Sleep.