JD wrote:

What motivation do you use to go out into the frigid temps to build a
fire and work in the shop (Mac, you can substitute hot for frigid if
you prefer)?

The first thing that popped into my head was what George Leigh Mallory
said when asked why he wanted to climb mount Everest: 'Because it's
there'. I know that's a bit glib and maybe even a bit zen--but that's
why I go out to the shop. Just being there and full of possibilities
seems to be all the motivation I need.