A few years ago I started a newsletter called iOS Goodies - the site is still up. I believed I could do a better job than all the iOS related newsletters out there. To some extent it was a success - the signal to noise ratio was high. Maintaining a newsletter is a grind, so I succumbed to its demands. Fast forward to today, I often think about great sources of information out there. I want to maximise the amount of information I get, without spending too much time reading it - I like sources that get to the point. So I find myself only subscribed to two newsletters: FS(Farnam Street) and TLDR. I think they are worth your time.