for an ADHD person, thinking can be your worst enemy. i give the following advice, for free:
don’t sit around and wait for motivation, it isn’t coming. just get up and start.
don’t think about what you’re going to do, or what order things will be done in, or write lists so you don’t forget (you know you’ve never remembered to check your list, besides, how could you? you’ve lost your notebook and let’s not get started on the disappearing pens). just do something.
you actually can finish the job. your mind strays everywhere but your body doesn’t have to. if you can’t fix your focus, fix yourself physically; for instance, kneel on a stool to do the dishes. sit on the floor to fold washing. you are more than capable of getting it done, just remember that it’s so.
i hope this helps.
post scriptum: i’ve just decided that it’s okay for me to put unfolded washing away in the drawers because it beats leaving it in a pile. better never stops!