I also use a lot of the same assessments as those mentioned above. But I also take photos of all my clients when they start. A front on shot and a profile shot. Not only does this provide me additional info. regarding alignment, but after 90 days, I take another set of photos and then send them to the client, side by side with their reassessment results. A photo doesn’t lie and most of my clients are surprised by the changes. They see themselves in the mirror everyday, so they often don’t see how far they’ve come.