For lettuce, when you get it home, cut out the "core" and the lettuce will last a lot longer without turning brown. I also put it in a bag with damp paper towels.
If you're like me and don't want to cut the core of the lettuce out, just hold it upright, and whack it on the counter and just pull the core out :)
If you're like me and don't want to cut the core of the lettuce out, just hold it upright, and whack it on the counter and just pull the core out :)