It's a worknight for me (at my crappy 9-5 job) so I normally don't drink... But tonight I had a glass of rum on the rocks.
Tip: here's how you avoid hangovers:
1. One hour before you plan on going to bed, stop drinking alcohol and drink as much water as you can.
2. You'll probably wake up and have to piss in the middle of the night. Get up, piss, then drink more water and go back to sleep. Repeat this if you wake up again.
3. Get as much sleep as you possibly can.
4. When you are good and rested, drink more water. Throw in a glass of fruit juice now and then (coconut water works wonders)
5. Eat some real food. In my experience, fresh vegetables and fruit are better than some greasy nasty McDonalds or something.
Most of the hangover is caused by dehydration, and losing vitamins/minerals through the constant pissing the night before. Mitigate these two things, and the hangover will be gone.