Another thing to consider is whether you're the kind of person who needs a lot of structure or some. If you're new to behavior chaining and like structure, I'd do them in order. If either of those aren't true and you will still get things done, be more flexible.
Don't worry about if you're doing it "right;" just do it.
If you find yourself struggling to, say, workout in the morning, maybe consider that a different time of day might be better for a particular task. Everyone is different, and certain times will be better for your routine than others.