Hi K.~
I know I'm a little late in responding, but I want to share what works for me. I have two boys, ages 2 and 4 1/2. The house is always a mess... to me... I have people come over and say the same thing... wow... your house looks great, while I'm cringing at the mess! We use wicker baskets in the living spaces to keep toys... the boys help clean up when it's time. I try to have them clean up the last thing they played with before they get out something new. Sometimes that works, too. ;)
The most important thing is mental, though. Picture the house clean and quiet. No toys... no screaming... no tv blaring the latest Disney flick... no crayon/play-doh/snack mess... Great, huh? Now remember what else that means: no sleepy smiles... no hugs and kisses from your beautiful children... no funny mis-spoken words... no one running to you yelling, "Mommy" when you walk in the door... no one to watch grow and learn. The list goes on and on...
This may sound funny or weird, but if you really think about what it means to have that "mess" and think about the alternative... well, it made it easier for me to give myself a break now and then. I recently had a terrible fall... I broke my back among other things... I've had awful dreams that my children or my husband have died... I'm healing really well, but I've also found my priorities... I'm still struggling with keeping the house from getting too messy, but I don't beat myself up if I let it slide sometimes.
Be well. This time will slip by too quickly. Forget about how clean things are. Enjoy yourself and your children.
~J.