I, too, am a neat freak, somewhat complusive even. I have 5 kids, all grown now, the oldest was 8 when the youngest was born. I used to wear myself out trying to keep the house spotless. Then it hit me--life is too short to sweat the small things. Their rooms were their "castles", their friends didn't care, some of their friends much prefered being at our house over being at home, any day!!! I was mom to so many kids!!!! Sometimes, you just have to realize what is important in life. I told the kids, "When you run out of clothes to wear, don't come running to me, and expect me to drop everything to do your laundry!" Soon, their clothes started appearing in the hamper. You have to stick to your rules and not give in. Of course, this doesn't work so well with very young kids, they have to be old enough to understand. When they left things laying in the living room, they were given 2 chances to take care of it, and depending on my mood, I either tossed it into their room, or I tossed it into the mud room, they had to guess where it went--sometimes, I tossed it outside!!!

Their rooms would get a good once over by me, every 3 or 4 months, whether they liked it or not. I never, ever invaded their privacy--I totally do not believe in that. I just would refold the clean clothes, put them away, pick up the dirty clothes they missed, do a good vaccum job, dusting--that kind of thing. The room would be spotless for a day!!!
I used to tell them--what goes around, comes around!!! One son was such a rascal, I used to tell him, I hoped he had 5 kids, 5 yrs apart, just like him. About a yr ago, he laughed, and says to me, "Mom, I think you cursed me, I have 2 kids just like me, a year apart and it's all your fault!!!!" Guess what, those 2 kids are 9 and 8, and he and his wife were totally surprised with a 3rd baby this year!
Just love your kids, and don't worry so much about clean rooms!!! One day they will be asking your advice too!!! Mine do, all the time now!!! They are 33-25 now!!!