Book Freak is a weekly newsletter with cognitive tools you can use to improve the quality of your life.Several readers emailed me last week to let me know they'd missed an issue. Actually, there was no missing issue. I took a break last week. I do try to write one issue per week, but occasionally I'll skip one when life comes at me too fast.While I have your attention, I'd like to let you know that Book Freak is published by Cool Tools Lab, a small company of three people. We run the Cool Tools website, a podcast, a video review YouTube channel, and a couple other newsletters, including What's in my bag? and Recomendo. I hope you'll check them out.This week, I'm presenting advice from Charles Duhigg's book, Smarter Faster Better: The Transformative Power of Real Productivity. Duhigg is a Pulitzer Prize–winning investigative reporter for The New York Times.