What makes a good blog? > As I think about the blogs I’ve returned to over the years – and the increasingly few new ones that really grab my attention – I want to start with, ironically enough, a list. Here’s what I think helps make for a good blog. - Merlin Mann
I just discovered this thanks to @ismh ’s ten years of 512 pixels post and I’d say every bit of it still applies today. Both posts are worth reading.