This year I am going to require customers to commit now for next year if they want to continue with my service. I plan on sending a letter explaining prices for next year, service options, and payment options. I may also include a survey for current satisfaction level. I will include a SASE and request that the letters are returned by a specific date, otherwise I will open the space for new customers. What I need is information from those that have done this before. What have you found to be especially helpful? What kinds of things should I avoid mentioning in the letter? How sucessful have your next season commitments been? Any tips greatly appreciated. Thanks!