My worry with a book like "31 Verses to Write on Your Heart" is that the verses will be taken out of context. I also have a difficult time with relating to and learning from short devotions. And while those were both still issues with Liz Curtis Higgs' book, I appreciated that she broke each verse apart to get to the truth behind each passage. But there was very little to take away from her memory verse tips for easier memorization. They all seemed cookie-cutter, straight from the book, obvious to me. Then again, I am not a great memorizer of Scripture (although I certainly wish I were!). For most readers, though, I could still recommend this book for its treatment of these important verses (many of which you will probably recognize - this book does not get its worth from originality).
*Disclaimer: I received this book for free in exchange for my honest review.