My hangover kit contains:
2 gatoraide powder mixes
2 tums powder packets
2-3 Advil packets
1 packet of peptobismol tablets
2 Alkaseltzer packets
They are pretty easy to make, I just used clear plastic bags from Michaels to hold everything, printed off the labels onto blank stickers I got from Staples, and then stapled the top of the bag closed. I used plain cardstock for the top of the bag to hold the label, and then stapled that to the bag as well. Thanks to all of the brides who posted this idea - I think that these bags are great! I am using the templates to also make a "wedding week survival kit" that has sunscreen, aloe vera, shout wipes purell, insect repellant wipes and wet wipes - I can post that too if anyone would like to see it. Thanks! Hope these pictures work - it seems to not want to upload them.
Thanks to everyone else who posted these ideas and let me "borrow" them. This forum is the best!