What does writer and human guinea pig AJ Jacobs keep in his bag?

In the latest issue of the What's in my bag? newsletter (published by Cool Tools, which I edit), my friend AJ Jacobs talks about four things he keeps i his bag:

A.J. Jacobs is a writer, lecturer and human guinea pig. He is the author of four New York Times bestselling books, including The Year of Living Biblically and The Know-It-All. He is a contributor to NPR, the New York Times and Esquire magazine and is a frequent TED speaker. His most recent book is Thanks a Thousand.

Life Changing Questions ($24)My friend the social scientist and mathematician Spencer Greenberg developed a deck of cards he calls Life Changing Questions. And they are just what they sound like. Each card has a Big Question printed on it (e.g. What have you changed your mind about? or What would you do if you had one week to live?) Spencers research shows these questions are the ones his test subjects find most valuable in reassessing their lives. I like to break the cards out at dinner with my family and use them as conversation prompts. They are much better than arguing over screen time.

ReMarkable ($499)This is an unusual tablet. Its main purpose is to allow you to take handwritten notes on the impressively paper-like interface. Its too expensive for what it is, but I still recommend it because its helped reduce my habit of having dozens of spiral-bound notebooks strewn about my office.