Get in love with the process, not final result

This is easy.

"I flip those burgers because I need a paycheck"

"I want to flip those burgers because I'm passionate about flipping burgers"

Both sentences might work, but the second one will keep you more happy.

More happiness less fatigue.

Now go flip some burgers

Nah I love it when I got the paycheck.
So I find someone cheaper than me to flip the burger, and take the the cut. XD