Attach your Fall Arrest System/ Full Body Harness to the tree before leaving the ground.
Always properly wear and use a FAS/FBH and remain connected to the tree from the time you leave the ground until you're back down.
As you ascend or descend, move the tree belt & anchorage with you. Maintain the least amount of slack in the tether that will allow for climbing.
The tether should be located over your shoulder and away from your neck at all times. Never under your arms.
Never hurry! Take short, distinct bites.