@Arizona Hot: I used to have to do a lot of flying. I once read a suggestion that, to get more space on long-haul flights, a good trick was to board the aircraft as early as possible, armed with a roll of toilet-tissue. One then places a single piece of toilet-roll tissue on each of the seats in one's row.
One then sits, holding one's toilet-roll almost reverently, and stares intently straight ahead.
Perhaps unsurprisingly, nobody wants to sit next to that guy with the toilet-roll. I tried it. Works every time, except sometimes on overbooked flights, but you can see their discomfiture.