Whatever you already do a lot can be used to reward what you avoid

David Premack showed reinforcement isn't some fixed list of treats — it's relative. Any behavior you perform often can reinforce any behavior you perform rarely, whichever two behaviors they happen to be, in animals or children alike. It's the formal reason 'finish your vegetables, then get dessert' actually works on a hungry kid.

— David Premack, Toward Empirical Behavior Laws: I. Positive Reinforcement — Psychological Review, 1959