Well the actually FLY Lady site is a bit americian and chipper, if you know what I mean.
But the principle is sound. i.e.
Do some house work everyday and build up regular routines which work for you and your home.
Don't beat yourself up about not doing everything right or right away.
Accept that a messy cluttered house took years to get that way and will not be cleared up over night.
Understand that a small mess left will gather more mess,like leaving mail on a table (hotspots)
You can't organize clutter, you can only sort (chuck or find a home for) it
The real key to a clean house is to clean as you go and stay on top of it and really chuck out things you don't need/love.
The above words, are my take on the FLY system.
It really helps me be motivated, when I looked around our home full to the brim with clutter...now I am nearly sorted and I feel so much better
HTH