Known habits are a good thing insofar as their ability to create a structure, because Structure sets you free. An operating cadence, for example, is a known habit (see Design an operating cadence).
However, not all habits are evident: we sometimes form unknown habits. Previously known habits may also become unknown when we stop actively thinking about them. When this happens, habits impede our learning because they turn into a blind spot that can’t be actively evaluated and improved upon.
To fight this tendency, it’s useful to periodically stop and make a list of known habits, continuously adding new ones to the list as they are formed and/or become known to us. This is a way to return to your origins and Reason from first principles.