Elon Musk on his schedule building both Tesla and SpaceX

In this 2013 interview, Elon is asked what his schedule looks like running both Tesla and SpaceX simultaneously. He responds:

“So the way I generally do it is I’ll be working at SpaceX on Monday. And then Monday night fly to the Bay Area, spend Tuesday and Wednesday at Tesla. And then fly back on Wednesday night, spend Thursday and Friday at SpaceX. In the last several months, I’d fly back here on Saturday and either spend Saturday and Sunday at Tesla or spend Saturday at Tesla and Sunday at SpaceX.”

As Paul Graham writes in is essay How To Do Great Work:

"It may not be possible to prove that you have to work hard to do great things, but the empirical evidence is on the scale of the evidence for mortality. That's why it's essential to work on something you're deeply interested in. Interest will drive you to work harder than mere diligence ever could."

Full video: Computer History Museum “CHM Revolutionaries: An Evening with Elon Musk“ (Jan 2013)