Inspect all parts of the climbers at home, put on safety harness at truck, assemble the climber, and hook up.
I'm tense throughout the entire climbing, anchor, removal, and descent of the climber. Find trees with soft bark, and avoid too small or too large trees. Lookout for widow maker limbs, rocks, or other potential impalers below. Check the weather, and do not use them in heavy wind, snow, ice, or freezing rain.