So many illustrators often fill their blog with waffles about what they did during the day (went down to the post office, had a coffee) as well as starting off their post with “Sorry it’s been so long, but I’ve been busy”
Toss all of that out your window and think, what is it you would want to read about.
As a creative, as an illustrator, what are things that draw you? Do you want other illustrators to read your work? What audience are you attracting?