Writing Incentive

Have had a bad case of the blah's today, feeling down and moody for no good reason and just want to go to bed with the covers drawn over head and old weepy movies on tv.  But how's this for writing inspiration?  Told myself as long as I sit here with words coming out onto screen, I do NOT have to get up and clean the bathrooms.  Let the word count commence!

What's the weirdest writing reward/challenge/incentive you've ever given yourself?