Lily and I had both had the flu, and while we were sick a few people really stepped up to help us out. Once we got better I put together a few of these baskets to thank them.
I got the baskets at my local dollar store, and just picked up a few movie-type snacks at the grocery store. I included a thank you card I had made a while back. In the card I included a $5 blockbuster gift card for the person I didn't know very well, and a 1 dollar bill in the ones for my family members to go toward a movie from RedBox. (Along with an explanation that RedBox doesn't do gift certificates) I figured it would be tacky to give a dollar to someone I had just met, but my brother thought it was hillarious.
A "movie kit" makes a great thank you gift and didn't cost me very much at all.