You’d think the human race would have sleep down to a science by now, but many of us are still sleeping poorly, and…

Popular Kindle books, a cheap Fire tablet, and Pebble Time smart watches kick off Saturday’s best deals.

Here are the best of today’s deals. Get every great deal every day on Kinja Deals, follow us on Facebook and Twitter

Commerce Content is created independently of the Editorial and Advertising branches of Gizmodo Media Group, Fusion…