Susan can't do everything.
She can't work ten hour days at Acme Sweatshop and have time left over to drink sangria and BLAHg.
She can't do it, she's only one person and a very low energy person at that.

If she BLAHgs then she can't read her pals' blogs, and when she reads her pals' blogs she can't always come up with a decent comment.

Susan employs an alternating schedule of BLAHging or reading blogs or sleeping. Sometimes she has to work in a marital obligation or two and then everything's thrown off.