This does not work if you have ADHD. I've tried this, and I'm like: "Ok. 5 minutes, and I'll do the very simple task" and then it will be an hour later and I'm like "Oh no! More than 5 minutes has passed!"

I've tried setting timers too, and those help, but I also sometimes turn them off because I'm more focused on something else, and I don't understand what the timer is supposed to mean.

I find a lot of this advice is well intentioned, but it does not solve mental illness.