I don't play TDM much as i like objective game modes better but when i do play a team deathmatch i normally stick to the perimeter of the map as i find running through the middle will just get you killed alot. I try to get as far away from my teammates as possible. Wherever your teammates are, the opposing team are going to be directly on the other side of the map. I normally try to sneak up behind then get a few kills and keep moving.