IMO, the Flylady system is a good way to go for avoiding things getting totally out of control. I don't follow it to the letter, but when I do the routines that she recommends, things really never get chaotic. Rather than focusing on weekly giant cleanups, the focus on doing a little bit daily and that makes all the difference. It doesn't matter what day of the week someone pops over

. I've got a long way to go with the routines, but there's a big difference in my home just from doing it partly. To avoid getting overwhelmed, you can simply follow the system by reading
Sink Reflections -- it's all in there without cluttering your inbox. Also, Flylady's podcast on BlogTalkRadio is really good to listen to when you're trying to change the mindsets that cause chaos in the home (getting sidetracked, being perfectionistic, etc.). I consider her an excellent life coach for those of us who struggle to "get it together".
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