I know some bloggers have a golden rule when it comes to their posting schedule. Only Tues-Weds-Thurs. Monday, Weds, Thurs. Never on weekends. Every day no matter what. I personally don't like posting on the weekends- I feel like no one reads.
I try to schedule posts during the week. I have just about the whole month of March planned out, but all of the posts haven't been written yet. It's just easier to do that for me, so I can stay caught up on reading blogs, commenting, and responding to comments. Usually, I don't have that many posts planned out. Sometimes I post on Saturdays and Sundays, but the majority of the time, I don't.