Turn all the lights on, set the TV to mute, if you can play it in the daytime (do so), party chat with some friends, double check underneath your bed and closet just to make sure no monsters are hiding and waiting for you
Seriously, play it carefully. I ran around the first level thinking nothing would see me.
Ha ha I love the idea that they have been there, waiting for you to play Outlast so they can finally come out and eat you.