Well, you probably want to play a different game! It'll all be over pretty quickly otherwise. In my experience, it takes some of the satisfaction in working out who is evil away if they're grinning from ear to ear every time a Fascist Policy is passed! If you’re stuck playing Secret Hitler anyway, try always lying. That way, when you need to deceive people in future games, it’ll throw them off. Your teammates will hate you but, hey, they’re making you play against your will anyway!