Here are some examples:
-we were talking about wearing hats the other day, and Jane (18 months old today!) went and got her 2 hats from the basket in the front closet. She can also put them away if I ask her to, because she knows just where they go. And they will always be there if she wants them again. (Well, we're not perfect...sometimes they do get left in the car or at Grandma's or....but you see what I mean...at least they usually are there).
-Jane has a funny fascination with part of a baby-food masher I've used with all the kids. Now it finds a home in a bottom drawer in the kitchen, and she pulls it out whenever she wants something to stick her hand in. She knows right where we keep it, and it's always there.
-Gene and Lucy can completely pick up the family room, kitchen and dining room by themselves (well, if we offer a slight bribe of chocolate chips it usually increases their willingness...)
-In those "after the kids are in bed" hours when all we want to do is collapse on the couch, it doesn't take any brain-work to put the toys away. In the days after Christmas when we had a boatload of toys invade our house, we didn't have the energy to find places for anything (we had all been sick)...and so "cleaning up" became "shoving all the toys under the tree and against the walls so at least we wouldn't step on them".
So...I've learned my lesson. Invest a little time in figuring out where things should go in the house, and reap a house full of peace and cleanliness.