For me, a major part of ADHD management consists of forcing myself to do something, multiple times a day. It's work, learning, chores-like tasks, sport, hygiene, regular sleep, cold morning shower, unprocessed food preparation - pretty much everything that isn't immediately pleasurable.

I'm "unhappy" multiple times a day when I start doing something that doesn't usually have to be done right away. But it's often a choice not between doing something now or later, but doing something now, not never.

However weirdly this may sound - I constantly do things against myself, for myself. I don't get much satisfaction from finishing those tasks but my life quality has increased drastically and I wouldn't go back from moments of discomfort to an ongoing discomfort.