How do you do things?

How?
How do you complete something you set out to do?
I never get anything done. Not on my own.
I mean: I have finished a couple first-draft novels on Nanowrimo in past years, but that required such an exhausting expenditure of nervous and emotional energy I nearly stopped writing afterwards.
Especially in the year when I did *two* novels for Nanowrimo.
But I lack that energy now, and I lack focus, and other things are going on, and so forth and I find myself sitting here, wondering, how do you guys do it, you guys who finish things. I am thinking of creative projects – how do you artists actually finish one painting and then start the next – how do you photographers get yourself outside taking pictures, or into the studio, or whatever – how do you musicians music? – but this would apply to non-creative projects as well – fixing one’s relationship, parenting, planning, household chores, shopping for a new suit, looking for a new job.
How do you do it?
How do you do it?
Only collaboration works for me. I am getting music done thanks to Horst. Evco got off the ground because it was a group project and because, at the end, Ute grabbed the controls from my paralyzed hands and landed safely.
But other stuff – writing, painting, photography – I sit on ideas until they calcify and inhabit my body like unborn twins.
I guess I have answered my own question, for me – I need a project manager, I need a collaborator.
How do you do it?