What makes a great technical blog

> Write regularly [...] mostly it's that they keep my attention by publishing regularly!

I'm going to strongly disagree with this. Keeping my attention is a cost, not a goal. You should publish because you have something that is worth my attention. Not publish to get my attention just for attention's sake.

Beside the rational, what's really great is the list of such blogs: https://lists.eatonphil.com/blogs.html