I try to spend about 20 minutes a day.
I really enjoy writing on focused questions, it sharpens the mind and more specifically, helps me collect and “succinct-ify” my thoughts on questions I’ve already been thinking about.
The trick is I only answer questions I’m very personally interested in, and already can compose an answer in my head before I start typing.
Then, it’s a fun break, rather than a chore. Traditional blogging has become a chore, although once I write something good, I feel pretty good after.