There are some great books on foam rolling. “foam Roller Workbook” by Dr Karl Knopf is pretty good. If you mean putting together a package by showing your clients how to foam roll, first learn how to do it yourself with all the correct body positions and contraindications. I see so many people foam rolling without holding the core, backs are bowed or shoulders overextended. You could get someone to take pictures of you in each position then write good step by step directions and use it as a hand-out to give your clients. Include Piriformis, IT Band, Quads turning the toes 3 directions to get all angles of the Quads, Adductors, Calf, Thoracic Spine, Lats, Rotator Cuff. Your clients will really appreciate it in the long run.