Read this thread today and utilized this method at work tonight. Only I slid that bad johnson over a breaker bar handle (too lazy to climb down from the helicopter to get a pipe. Hey, it's quite a climb, especially with tools in your hands!) Those bolts securing the fire control radar to the top of an Apache can be a real pain. Especially when they're caked with sealing compound!
EDIT: I reckon I could add some of my own tips and tricks.
If you're dealing with a stripped screw or a tight one you worry about stripping use a screwdriver drill bit and fit it into your appropriate socket. That way you can add downward pressure to prevent the bit from jumping. If your still having problems spit on that bit and roll it in some Iraq sand! Or whatever sand you have handy... EZ grip works great too.
Also, I keep a some modified sockets on hand for specific jobs. A few that I've shortened with a saw to fit in some hard to reach places and that I've sanded down so the sides are thinner to access recessed hardware.
Aside from that I keep my mental toolbox stocked. Cell phone is off, belly's full and regular breaks to let the hands rest and the nerves cool. More often than not when I'm stuck on a task all I need is a short nicotine break, then I quickly solve the problem once I return. Also, an extra pair of eyes can be helpful. Someone else see an approach you never thought of.