Charlie Taylor suggests that the limited nature of a lot of current research means that it is hard to form generalisations based on it and so hard to put into practice.
Helping students find out for themselves is a key reason for introducing them to corpora. Their understanding of grammar and their ability to make correct choices will both improve.
Charlie Taylor stresses the importance of liking your students, being organised, engaging and positive. Forging good relationships will make you more effective.