Plan for the unknown
iStock/BraunSEven if you're running right on time, odds are good that other people aren't. If someone else is running late, that, in turn, will make you late, and that can make you crazy. (Learn the best ways to tame your anxiety.) There's always traffic to account for, public transportation that doesn't run on time, and longer lines at stores and pharmacies than you anticipate. Knowing you've got a cushion can really take the pressure off, so bring a small book or listen to a guided meditation on your phone in case you find yourself with some time to kill.