Sometimes when you feel like **** like that, you have to just go to bed and call it a day? Grab a book and start reading about someone else's problem until you get enough of it in your head you can think about it while you fall asleep (instead of your own thoughts/worries) is what I do.

Do you drink enough water and take a B complex vitamin? Drinking uses both of those and that's why one gets hangovers (mostly because of the lack of water; the brain uses most of the water in the body and the body makes sure there is "enough" water for the brain so when you get short, you get the headache, etc., lots of headaches can be eased by drinking some water (takes some time though); people think OJ or aspirin help but it's actually the water in using those that is the key). I keep bottles of water (room temp) on my dresser for my needs at night (aspirin, vitamins, some meds I take in the middle of the night) and one in my bathroom (rather than a cup/tap water). Think up a healthy routine and put it into practice and it might distract you some from your reasons for wishing to drink?