More Than Points

I have not tried this myself so try this at your own risk. I suggest testing it on someone who is much smaller than you.

Wired magazine explains how to capture the armrest on an airplane with 3 easy steps.

3 Steps to Armrest Checkmate:

1. Midway through takeoff, recline your seat 2 inches.
2. Slip your elbow into the gap between your neighbor’s seat back and your own.
3. Slowly pivot your arm forward till it dominates the disputed territory.

If you need pictures, then visit the source.

Good luck!