Ok essay incoming but Iām the same way and this advice is assuming that you have tried various ways to remind yourself of things (physical notes, reminders, alarms, schedules, to-do lists, whiteboards, etc) and struggled to respond consistently to this kind of stimuli. If youāre not already reminder-maxxing I recommend seeking out the most effective method for you to be unable to ignore the reminders. Might have to change over time as you become desensitized to one kind.
Once youāre seeing the reminders daily, the struggle is then acting on them. Seems obvious but sometimes when Iām struggling to complete a task or to do it regularly/form a routine, it helps to zoom in on my reasons for wanting to do it at all. Sure, running every day will make me burn fat and improve my cardiovascular health etc etc etc but sometimes for me with my neurodivergence those long term goals are too lofty and too postponable. Instead it really helps me to think about what kind of immediate reward I will get for completing a task or repeating a taskāsometimes the immediate reward is just an immediate reward (āif I go for a 15 min run Iāll feel endorphin release ā) and sometimes itās the removal of a punishing factor (āif I go for a 15 min run Iāll avoid the shame and anxiety of not doing the thing I said I was going to do todayā. thereās a term for this in operant conditioning but I forget what it is). This is why for the really important stuff, I opt for a loud annoying alarm because one can only handle so much snoozing or postponing before it becomes easier to just do the thing.
Another piece of advice would be to harness the initial anxiety that a reminder prompts and act on it as quickly as possible, before the anxiety turns from motivating to crippling and before you can think of excuses/justifications for avoiding rather than acting.
I hope this helps! Iām far from perfect with this stuff and always having to adapt to my own ability to fall back but this has been the most consistently useful approach for me.