Graduate a client - Export their data
When a client "graduates" and completely stops training with you, it would be nice with a "Graduate" button which exports all his workouts (nicely, so he could print it), all his stats, meal plan, etc., into 1 PDF file which you can e-mail to them.
The export could have settings to choose which training plan to export, or choosing what time period.
The file could even have a nice front page, and a "About your trainer" section, a list of Personal Bests, links to social media, etc,.
As a soon-to-be graduate, I really want to be able to see my progress. Exporting the data to excel would allow me to analyze it!