In my 1st outing of the season, I wasn't really paying much attention to detail so here's a tip you won't want to forget that I learned the hard way.... make sure your tree doesn't get bigger as it goes up. Usually I start my climber at a slight angle so it can level out as you go up... well this particular tree happened to have a spot where it got larger, and at that point, I was stuck because instead of leveling up, my platform and seat section were at a severe angle.
Size up the tree and your approximate climbing height. If you climb high, it's a good idea to start at a slight angle. But if your tree has a pot belly about 15' you might be breaking a sweat and making a lot of commotion.