starting
Have you ever watched the limo drivers parked in front of a hotel? They often seize the moment to take a nap, but they also take those resting moments to polish their cars, to dust the interiors and buff out the doors.
One thing (among many) I've learned from my brother and his Marine Corps buddies is to pick up a broom if I can't think of anything else to do. Just start. In my old days as a therapist, I used to prescribe some kind of action for depression (in a world of pharmaceuticals, the response was often a puzzled look).
Work out, volunteer, just do something. Mrs. Gummidge, the "lone lorn creetur" from David Copperfield, was transformed from her depression and isolation as soon as she just pitched herself into some acts that were helpful to others. As a coach, I often tell people to pick one tiny area of their lives (desk, car, underwear drawer) and clean it up thoroughly. At Landmark Education, they'd say, "Make it impeccable."
There are lots of theories about getting things done, but every single trek starts with that first stumbling step.