Not a clue. I would imagine keep it in the open and periodically let it rest would be about all you can really do. I'm terrible for using it for 12-14 hours at a time between playing games and watching Netflix and whatnot, or falling asleep on the couch while I have a game paused.
Mine freezes occasionally depending on the game -- some are worse than others. LBPK froze a lot during online play. Like, a ridiculous amount.