If you want to stay ahead of your competition,then you need to put a system in place for yourself. using a notebook to assist you in your selling, will help organise your selling strategies,and keep you focused to the selling tasks that you want to achieve. because if you can overcome obstacles in selling you can progress and get some brilliant results. More
if you are in sales ,then you must have a system in place,as you know targets are set in sales,then if you don't reach them, then you have someone on your back,because you don't want the pressure on you,a system is put in place,since sales are a good way to make money,you need to make you have all the tools available too you,maybe this book can help you to do this?