D.W.
First, I don't believe in taking away something like bedtime stories. That is a very special learning and bonding time and not to be used as part of discipline in my opinion.
He's 3. 3 year olds don't have the concept of time that adults do. You will need to minimize his distractions while he is on a task (no tv while he's getting dressed, that kind of thing) and give him reminders while he is on a task. Just keep using verbal cues to keep him on task. But you don't want to over do it because then he'll tune you out.