Here is a parenting “trick” I’ve used for many years: I allow exceptions to the normal rules for the children as long as the exception includes something I want them to do more of.
Here are some examples: I don’t allow the kids to have food outside of the kitchen. But if the food is raw veggies, then that’s an exception. The kids love being able to have snacks in the playroom, so they eat more carrots and cucumbers. I extend bedtime by 30 minutes, but only if they’re in their beds reading. Kids tend to value ANY extension of bedtime very highly, so they do more reading as a result.
As an adult, no one makes you do good, healthy things like read and eat vegetables. But you can certainly do so yourself! Trick yourself – put your phone charger across the room instead of next to your bed, and put books on the nightstand instead. Put bottles of water in your game-room mini-fridge instead of beers. However you do it, attach some healthy habits to your indulgences and watch the benefits come along for the ride.