Right now if I look at my Overdue tasks I can't also see all the tasks that I've scheduled to today. This doesn't work great for me because I want a quick way to see all tasks that relevant to me right now, which might involve picking up a task I was supposed to do e.g. yesterday, or one that I scheduled for today.
Custom filter options aren't flexible enough to allow this, to my knowledge. It would be good if there was a way to do this.