What to do with a lock of hair?

My girlfriend said she's going to give me a lock of her hair, and while I find it cute and endearing, I'm not sure what I should do with it other than put it in an Altoids tin.

Are there any fun ideas of what I could do with it? I've never received something like this before, so I'm just not sure what to do.
What to do with a lock of hair?
Post Opinion