You'll be able to hold your liquor better on a full stomach. Have a mighty meal beforehand and try to work a lot of starch into it. Potatoes are god at this.

Keep drinking stuff like soft drinks and water as you drink alcohol. Personally, I like to munch on ice in between drinks. Don't go too hard. If you're planning on drinking a lot of alcohol, it's better to pace yourself than to slam it down within a short space of time. But I understand that this isn't always possible, especially if you're as bad at drinking games as I am. xD

These tips help you to not get drunk in the first place. But remember, it's a delicate balance. Filling up your stomach won't make you invincible and if you do exceed your limits and vomit, having a full stomach is going to be much much worse for you (and whoever has to clean up after/take care of you).

So I'd like to finish up with the best piece of advice, drink responsibly.