Two Steps to Cleaning for ADD

I have ADD (Attention Deficient Disorder), so whenever I have to clean up a space and it's badly cluttered, I have a difficult time getting my mind around what to do first. Having really simple steps helps me with a lot of things, so, here is my solution taken in two steps:

1. I use a handheld whiteboard (you can also use a small notebook to write in) and walk into the room as if I'm walking into it for the first time. I then proceed to write down the things that I see needs done.

2. I go down the list in order, putting away and cleaning as the need dictates.

This process has been very helpful to myself, so hopefully somebody else with the same problem as I do can use this in their own daily life.