This obviously doesn't apply if you've got a big carry-on you need to worry about getting into storage or if you're on an airline like Southwest, for which it's first come, first serve. If those aren't the cases, then sit and watch as everybody complains about standing for 20-30 minutes filing into the plane. Finish reading your newspaper, make a last call, or get a little bit more work done with that Wifi access, then walk right on and to your seat.