A list of interesting newsletters (mostly about programming)
I find weekly newsletters a convenient way for digesting information. It works as follows: someone knowledgeable prepares a curated list of links on a particular topic: articles, blog posts, news, pull requests, etc. and sends it weekly by e-mail to all subscribers. Then you can save time by skimming through the best links on, say, Friday instead of reading them one by one throughout the week.
Currently subscribed to:
Hacker Newsletter - "Best articles on startups, technology, programming, and more. All links are curated by hand from Hacker News". If you choose the only one of those I recommend this newsletter, it's simply the best.