One way I do a large project is to go in to the room/space face the corner of the room start there And work with my back to the Door Never look behind Me, So I can't See the Mess As I Go working my way Out of the Room Seeing the 'Clean' as It Appears in front of Me! Stop if I get Worn/tired/go back the next day! Don't Know If this makes Any sence But it works for ME. LOL.