This week on the podcast we’re powering up your brain, making your online life more secure with two-factor authentication, and figuring out why everyone’s pissed at Twitter.  Also, we’re answering your questions about home automation, Linux on Macs, and a diet that actually helps you put on weight.

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Kindles on Fire, Amazing Feats of Water Cooling, and Making People Tell the Truth

Each week, Jordan Calhoun and Meghan Walbert of Lifehacker brings in all-star guests to tackle the stuff that matters—like how to be happy, how to buy a TV, how to be less bad with money and how to tell if you’re dating a psychopath. Look, you're doing great, but quite frankly we think you can be a little better. All your friends do too. It's time for The Upgrade.