This is one of those things that non-teachers don't entirely get. If you work in an office, time is pretty flexy. If a meeting can benefit by running an extra 10 or 15 minutes, you just do it. But in most schools, when the bell rings, you're done. There is no little extra bit of time you can just throw into the work.
One of the biggest reasons you don't want to follow a routine is that you want to feel in control of your choice of what you do or don't do. But as anyone with no routines can testify, a lack of structure can leave you feeling completely out-of-control. Here are some ways to reframe the way you think about routines so that you can still feel in charge.