Be polite and ask him about it. Take up no more than half the drawers and closet space and stuff. Doesn't matter if you're male or female-- taking more than your half of the space is rude. If I were you, I'd just ask him right off if he wants to carpool or anything. And then just take turns with the TV. Offer it to him first (but say, "you can pick first" to imply you want your turn, too) and if he has any manners at all, he'll offer it back to you when he's had his turn and he'll let you give input into what you watch. Just be polite. Especially if it's a business trip, he's probably going to be a professional and try to have a polite, professional relationship. It's not a frat party or anything. If you have any concerns, bring them up. After that, just be yourself and go with the mood of the room. If he wants to talk, talk with him. If he wants to watch TV, don't talk to him. There'll be some awkward moments (I always have them when sharing a room with a stranger or really anyone, whether male or female), but just go with the flow and don't stress about it. Stay breezy.