A good first aid kit?

[benna2]

I was looking at my fabulous local target store and saw a few first aid kits but decided not to buy one right away. I'm not really sure about all the stuff that should go in one for a backpacking trip. I don't wanna bring too much stuff, but I don't want to forget something either.

I am thinking of just buying the stuff I need and just making my own kit.

If anyone has done this, what was in yours?

Thanks and be careful on your travels so you don't even need to use it!!