Before you glue up wood for a project, examine the parts. If at all possible, start out with cleanly cut, perfectly straight boards of the proper thickness. Take out any bow or warp before you begin your gluing work. By using straight and true stock, you won't have to force the boards in one direction or another, and you won't have to get into tricky, complicated clamping set-ups.
If you have a step ladder that is tall enough so you can’t see the top when standing beside it, be extra cautious about tool placement. Leaving a tool like a hammer on top is easy to forget. When you move the ladder, it could slide off and drop on you. The best bet is to use a tool belt to carry unused tools, either strapped to your waist or tied around the upper part of the ladder.