I used to be really diligent, posting on my personal blog every day without fail. Now I can only manage once or twice every week.
I kinda cheat and set up all of my content and then have it auto post with a little program i have. Then I can leave it for a month or two = and still have daily content... yep, am a cheater...
I update my blogs once in a week.. Thats because, i have to write contents for them and I am truly a slow typist.