The first two or three weeks on a new job are extraordinarily draining. Give yourself time to settle in. And don’t expect to have it down for six months. Meanwhile, keep asking yourself (frequently) questions such as “What do I have in my hand? What should I have in my hand?” And swear to run a checklist before you leave the house (with your keys in your hand), leave your car (with your keys in your hand), and leave work.