Tie the seat and platform of your climber together(preferably no more then 4-5 feet apart). If the platform gives and starts to slide you can still recover it and get down safely.

I always carry a spare release. I shoot a truball but my back up is a scott. I've made my treestand and had to pull out my backup release from my pack more then once . If your back up isn't identical to your prefered release make sure you shoot it and are as proficient with it as you are with the one you're not supposed to forget at home.