I discovered Sid Savara's blog today while browsing Hacker News. Unlike most productivity blogs I have come across, Sid's blog has very practical information that is easy to understand and apply. I've only started exploring his posts, but his description of metawork and his post on paying himself with his time were real eye-openers for me, as I too think in terms of "time" and his post reaffirmed my thinking. Like myself, he is also a follower of the GTD method.