Don't Be Lazy, Use HTML Labels Correctly
Whatever you do, don't make clicking the label do something other than check/uncheck the box, like how Xfinity's boneheaded login page brings up a 'help' screen when you click on 'Keep me signed in': <a href="https://login.comcast.net/login" rel="nofollow">https://login.comcast.net/login</a>