Teflon spray is cool, but I usually just use Molly Grease.
A graphite lube I'd like to try though.
Toxic is right though - don't use WD. It's not a lubricant (though it does have a fish oil in it), it's actually a cleaner. It's abrasive.
I actually Ctrl-F'd this thread for "WD" first thing to make sure nobody was saying to use it.