Moisture in Headlight/Repair

I've got the well known moisture in the driver's side headlight issue. I tried to tighten up the o-rings/bulbs and was hoping that would solve it, but no such luck. So I'm going to try to redo the headlight- the ole "baking" repair.

What do I need to buy to reseal the headlight? Does anybody have any advice or any DIY threads to point me towards?

Thanks!