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Here are some ways to get new posts sent to you!
RSS: You can keep up with new posts via my RSS feed if you use a feed reader (if you want to try one, I recommend feedly). You can get topic-specific RSS feeds for tech, altruism, or misc posts.
Email: you can sign up for this Google group. (Your email address won’t be visible to anyone else.) Be sure to change the “Email delivery preference” setting to something other than “Don’t send email updates” so you actually receive email!
Social media: I also sometimes post new articles on twitter and facebook. I don’t always though.