I really love the clarity and intelligence of Michael Linsin's books and suggestions. You can read The Happy Teacher on Kindle for free if you are a Prime member. A Classroom Management System for High School Teachers is also great. Give it a download!

14 Questions To Ask Yourself Before The First Day Of School

https://www.smartclassroommanagement.com/2018/07/21/questions-to-ask-before-the-first-day-of-school/

https://www.cultofpedagogy.com/episode-48/

https://www.smartclassroommanagement.com/2010/05/15/should-your-first-consequence-be-a-warning/

https://www.smartclassroommanagement.com/2014/01/04/how-to-give-a-warning-that-curbs-misbehavior/

https://www.smartclassroommanagement.com/2011/12/17/how-to-give-students-directions/

https://www.smartclassroommanagement.com/2009/06/07/supercharge-your-classroom-management-plan-through-modeling/

https://www.smartclassroommanagement.com/2018/06/30/11-things-not-to-do-this-coming-school-year/

Via negativa is a method of improvement whereby one focuses not on what to do to become more proficient.

But on what not to do—which, for many, is an easier proposition.