I have had “10”, an e-book by David duChemin in my iPhone for a little while, and will read a chapter here and there when I have time. It really is worth giving the time to sit down and absorb it though.
One of the great things about this e-book is that instead of just giving a list of tips, he tells you why each one is important, and a bit about how to use it. At the end of each chapter is also a practical assignment you can do to drill each of these 10 ways to make your photography better into your photography “muscle memory”.
Read the text, look at the great photographs, complete the assignment, improve your craft. Not bad for 5$.