I recently unsubscribed from quite a bunch of newsletters using unroll.me (great service). However, there are a couple of newsletters I'd still like to recommend:

• Weekly “what's new in tech” from Benedict Evans: http://ben-evans.com/
• Noise-free tech news from Owen Williams: http://char.gd/
• FirstFT – A daily briefing from the Financial Times, which is a great start of your day to know what's going on.

You should also follow Benedict on Twitter, that's a great way to get updated about tech news fast.