A personal trainer is a great investment in your health. But if a personal trainer doesn't fit in your budget or schedule, there are several ways you can take on the role yourself. Here, Fitness Town and Life Fitness explains how to do it successfully. Eliminate Excuses. Fitness professionals have heard every excuse in the book for why clients can't attend their exercise sessions. When you are your own trainer, disciplining yourself can be difficult. Take time to journal all of...