Yeah, Michelle, that's what I found. I think flylady is especially good for 'average' SAHMs who just haven't learnt how to deal with housework as 'work' (as I did.... I was a disaster for the first 5 - 8 years!) and who are drained of energy by motherhood. ( Its a proven fact that broken sleep damages your ability to make even simple decisions). So when you just can't face it all, it helps.
I think it is like any such system, you have to take what you can use and ignore what isn't helpful.
I found the emphasis on positive self-talk very useful, as I tend to get a bit negative and resentful of housekeeping eg "bloomin cooking....what's the point when they're going to complain about it anyway.... scrubbing toilets... didn't spend five years at university to scrub toilets....." etc etc. So now I just accept that the housework is the price I pay for getting to work from home and not rushing off to an office with people I don't like, and listen to a podcast or music.
Also the 'don't obsess' - ie, whisking the vacuum over the worst bits and wiping over the countertop is better than nothing, esp if its going to take me another week to get around to the full works.
Getting up and getting my shoes on is a biggie - I get SO much more work done if I get up and dressed straight away, though there's days when I consider getting back into bed once the kids are at school!