What helps me right now is being in a very simple work environment. I'm at a retail pharmacy store, and I work as a pharmacy assistant (a general worker profession). Working in a place which is quite messed up when it comes to rules and organization, you can slowly begin to compromise with such imperfect system, compromise with imperfect workers and eventually allow yourself to "slip" into casualness and have a little fun while working.
In fact, work environments in general can be good for you, as while they're never perfect, you can keep being yourself while allowing yourself to gradually be more flexible.