I've followed Crystal Paine's blog entitled MoneySavingMom for a couple of years now.
Her posts are always informative, interesting, and uplifting. They're also quite helpful and encouraging. She blogs about, well, you've probably guessed it--saving money! But she blogs about balance and discipline in areas beyond just money. She is a cash-only-spending, homeschooling, Christian mom who writes (and speaks) about finding frugality and balance within the family. Her posts appeal to Christians and non-Christians alike. To homeschoolers and non-homeschoolers alike. To moms and non-moms alike. Her information is just accurate and educational, regardless of one's circumstances, if you want to get a grip on your finances and sanity (she looks at issues such as time management and clutter control!).
So, while I've not read Crystal's new e-book entitled, "21 Days to a More Disciplined Life", I have no doubt that it is excellent and worthy of your 99cents! (That's the current price...subject to change, I'm sure!) If this is an area of interest to you, I'd blindly, yet highly, recommend Crystal's book--which is available HERE!