I work at Andreessen Horowitz ('a16z'), a venture capital firm in Silicon Valley that invests in technology companies. I try to work out what's going on and what will happen next.
I send out an email newsletter every Sunday. It covers everything interesting I've seen in tech and mobile with my view on what it means, and also has a digest of my blog posts. It's my notebook for the week. There are now around 50,000 subscribers.