The following list is not going to be exhaustive, please add you own concepts that I forgot or neglected.
1. Marketing Genius
Before anything else goes, how you market yourself is going to be the single biggest influence on your success. Ultimately, teaching English is teaching English. It doesn’t matter how smart you are, how many qualifications you got, or even the experience in teaching you have acquired. First and foremost, know how to sell the idea of teaching that mothers are looking for. It isn’t as easy as it sounds.
2. Develop a full package
To retain students, you are going to need some level of substance in your offer.