Wow that's actually quite difficult to think of an alternative without making massive assumptions about your lifestyle lol. I mean, it could be anything really ... video yourself eating a brussel sprout every day you haven't finish the novel.
One thing I'm going to try -- I'm going to make a video of myself with a tin of catfood and I'm going to promise that if I don't finish so many words by such a date, then I'll eat the entire tin of catfood via Facebook live.
You know, I had the same initial thought myself (regarding your first sentence). At least, if I'm right in what you're sort of alluding to there. But cat food works, too. :)