It's time to do some creative problem solving for the issues that plague us most. As you review my suggestions, notice how most of the changes that I suggest are primarily made to the house, not to someone's behavior. This is the bottom line for a house that cleans itself: You set things up so that the house does the work instead of you!
Let's start with a simple one:
Where: the kitchen floor
What: hubby's shoes and dirty socks
Why: Because that's where he puts 'em when he gets home from a hard day of work. Every day.
Mindy's suggestion: Get an attractive container, such as a basket, that's just big enough to hold his shoes, and a small lidded trash can (which will serve as a laundry bin for his socks). Put these two items side by side exactly where he usually leaves his shoes and socks, and tell him that you need him to make one small change to the routine: His shoes go into the basket and his socks go into the can. Even if you have to put these things in the middle of the kitchen, do it: The key is to put them exactly where he always kicks off his socks and shoes anyway.
After several weeks, once he has formed the habit of putting his shoes and socks into these containers rather than on the floor, move them slightly in the direction where you wish they would go (closer to the wall or around a corner or whatever.) Keep an eye on how well he continues with the habit of using the containers rather than the floor. (If he starts using the floor again, you moved them too far, too fast.)
Eventually, you should be able to relocate the containers to a more suitable place without ever asking him to form a completely new habit. In the meantime, though I'm sure you don't want a basket and trash can in the middle of the kitchen floor, at least you are making steps toward fixing an irritating problem. You'll also see that shoes in a basket and socks out of sight in a can are preferable to what you have now. Just don't forget to grab those socks on laundry day!
One final note: If it sounds like I recommend training a husband the way you might train a dog, please know that this is also how you train yourself. If you have a bad habit of putting something where it doesn't belong, you should follow the same procedure I've described above. The whole reason things like shoes end up in the middle of the floor is because it's a mind-less process, something you do without even realizing it. In your more coherent moments, however, you can containerize and relocate any misplaced mess. The key is to do it gradually, not all at once.
Check back next time for another out-of-the-box solution to a household problem.