This is very close to my creative process. The secret is being organized enough to make good use of those energized moments.
Bunson Hoppydew: It's too hard! I can't do it!
Bunson falls asleep sitting up: Zzz zzz
Bunson: Zzz do the thing zzz wake up zzz too sleepy zzz five more minutes.
Bunson (shakily awake): Huh? Whuh? What day is it?
Bunson has his paw out towards a mug of hot cocoa.
Bunson frolicking along.
Bunson: This is easy! I can do anything!