How do you get your children to keep their room clean?

I think the best way to keep a kids room clean is limit the mess. I have very little to no toys in the room that dont have special places then at clean up time they know where everything goes this works with my little ones well as for my teenages I dont no. I think once they move out I may see the floor. I dont enter into these rooms anymore and boy do they stink but do they care no. Next will be to throw everything I think and jump up and down.

This has been a problem in our home at various times, too, and I think it's a problem endemic to parenting. The thing is, it's a problem for parents, but not for kids, so the only way to get them to do it is to make it a problem for them. A few things that have worked for me: Absolute best thing I've ever done was to set up an afternoon routine. During the school year we do it after school; in summer it is just after lunch. They have a snack just after getting home (in summer this is moved to after all chores are done) and have 15 minutes to eat it and decompress. They then have 15 minutes to clean their rooms. Finished or not, they move on to homework time (in summer, we read for 30 minutes) for 30 minutes. After homework time, they do a chore either before or after dinner, depending on our schedule. The TV can only come on after everyone has finished the entire routine, so if they don't get rooms clean or homework finished, they have to go back and finish after chores. They also may not play computer games until they are finished with everything. It definitely cuts down on the yelling. I also found that my girls were overwhelmed with their messy room and didn't clean b/c they didn't know where to start. I broke it down into tasks that they do in a certain order. First take everything off the bed. Second make the bed. Third pick up everything off the floor and put it away-this is broken into sections if needed. Last, clean out closet and under beds. For a while, the list was posted on their closet door. Finally, I realized that they just had too many clothes, and being girls, they tended to change about 5 times before school and leave all the things they'd tried on in the floor. Those would eventually be shoveled out and make it to the laundry, so half the clothes I washed were clean. I went through every closet and drawer and left each kid with 5 play outfits, 5 church outfits and 5 school outfits. Cleaning their rooms and doing laundry became so much easier. Also, I periodically go through toys and get rid of everything that they no longer play with. They have less to dig through to get to the things they really want, and less to pick up.