Headlight clips in a '91
 

Hey guys, I am trying to get the headlights out of my truck and there are these little plastic clips that are holding the assembly in place. I was wondering how to get these off without breaking them. I realize that they're fairly cheap parts, but still, I'd like to learn how to do stuff without breaking it. Here are two photos illustrating what I'm talking about.

This comes from the drivers side headlamp. Advice is appreciated. Thanks guys.