What kind of motivation? For performing one's job? For hobby projects? For cooking vs ordering out?
For example, if I have to do a major deep clean and I haven't reached the point where it's bothering me sufficiently to self-start, I'll watch an episode or two of Hoarders and that seems to do the trick to put me in a headspace where I'm literally itching to enthusiastically and violently attack a mess.
For work, I'll put on music like https://youtu.be/kGhHPX_TaI0
or https://youtu.be/wELOA2U7FPQ
For cooking...I haven't found a video to kickstart me, but I usually have to plan ahead for the day, try not to get sidetracked in the late afternoon (which seems to be my hyperfocus time of day), and guard how many spoons I have left by mealtime in order to feel up to cooking. It helps to play a favorite podcast while I cook. The favorite podcast method also works great for doing dishes & laundry.
A woman once asked me if I knew the difference between reindeer and caribou. I said "sure, reindeer are domesticated caribou."
Her reply?
"Well ackshually caribou are wild."
This exchange occurred in Alaska.