Make your kids clean up any messes they make. My daughter came in with two jackets that had been on the trampoline for a week. They've weathered rain, snow and frost btw. She brings them in and clumps of dirt are now all over my floor. So what to do?
a) Pitch a hissy at your kid for making a mess
b) Send them out of the room while you sweep up the floor
c) Get angry and make them clean up their mess.
d) Let out a big, "Arrrrgh" then suggest they bring out the laundry basket, put the jackets inside and sweep up the mess.
I suggest going with D (this time at least)
If you have always taught your kids to clean up their messes then guess what? They always will. Keep your cool so your kid doesn't get freaked out but ALWAYS let them clean up. The older they get the better job they'll do but compliment the effort and feel free to say,"Oops, missed a spot" if they need to do better work. DON'T FORGET to compliment their great work and thank them for cleaning up their mess.
Here's the deal.
Even make your baby clean up their messes. You'll thank yourself down the road if you do. Remember, If they've always cleaned up their messes they always will.
How do you make a baby clean up their mess? You know when they launch their cheerios off their tray? Pick them up and with a quick and firm voice say, "Food stays on the table." Put them on the ground, take their hand in yours and pick up the food together. Put it wherever you choose. Calmly put the baby back in the chair and continue eating. Drop the subject.
Then when the baby begins eating say something like, "wow, you got it all in your mouth, thank you!" Don't forget the cheesy smile or high five.
This seriously continues forever. As they get older, cheerios turn into clothes, basketballs on the lawn, bikes in the driveway, empty milk bottles on the counter, etc. You'll always have to do refresher courses on cleaning up their junk but if you do this right, you'll get less resistance and they'll have created a good habit.
Kids need to know what you expect. (Firm)
They need to be responsible for their messes (Fair)
They need to feel you appreciate their help and you noticed their good effort (Friendly)