I've tried all kinds of ways of keeping track of what it is I need to do, but the only one that works is pen and paper. I've tried Google docs, apps on my phone and the Franklin-Covey Daily Planner and they all stink.
The problem with all of them is the extra steps. Open the app, click on Google docs, find the book and open it up, click on this, copy that. It's too much, I tell you!
Making the list fresh each day also reinforces in your brain what you need to get done.
What do you use?