OmniFocus 4 - Michael Tsai

I like Tsai's blog which is filled with round-up type posts regularly. I don't often link to them mostly because they are "round ups" of other posts, so it seems fairly meta to link there. However here he goes deep on OmniFocus 4. He is clearly an avid user, as am I. I found his writeup good and even learned a couple of things from it — including the 'double tap' gesture on the iPhone.