You could see if there are any IELTS testing centers in your area and train to become an examiner. This could help with your exam classes.
Also, you could find out if there are any national/local ESL groups or associations in your area. It's always helpful to have a support network of ESL professionals.
I found this book to be a great help. Brown, H. D. (2007). Teaching by principals, an interactive approach to language pedagogy. White Plains, NY: Pearson Education, Inc.
All the best,