Hangovers are the absolute WORST.
It's estimated that throughout our lives we will say "I'll never drink again" at least 100 times, all due to severe hangovers. Okay, there isn't any scientific research to back that up. That's just what I assume.
Anyway, there is one kind of alcohol that you can drink that will have less of a chance of making you feel horrible the next day. Blanco tequila is made from 100% agave, which has no sugar or corn syrup. Without those two ingredients, your body is supposed to be able to process the alcohol cleanly. So science says to go for the blanco tequila the next time you're out and you have an important work meeting to get to the next morning.