LPT: When cleaning a room, take a picture of it with your phone, and look at that to get a more objective view of what needs to be put away.

When you see a room day after day, your brain gets accustomed to things being out of place (left on the floor, on a table, on a dresser, etc.). Looking at a photo cancels out this effect to a large degree, and will give you more of an objective view of what needs to be cleaned up. It's actually similar to seeing a Preview of a reddit/blog/whatever post before you submit it.

I started doing this after I thought I was done, and it's amazing how much it changed my view to show me what was left. Works great for kids too.