Your idea already has a great potential actually because of the item of motivational message. It's a very positive thing already. But we all know those static media (postcards,calendars,post its etc). Sending it over email it would lose power. If you indeed could personalize it in some sort of way. If I had something that could motivate me at the right moment then that thing would be very powerfull. It had to sense when to bring the motivation almost like a human. Yeah you could let me fill in a profile and based on that send "personalized" motivational messages. Maybe mix in some other data like what I have bought etc. But that s just a part of it. I'm thinking of a bracelet kind of thing. Like those fitness bracelets. Those can already send personalized messages based on the data they have gathered. But they are obviously (physical) health related. The motivational messaging I'm thinking about would be about maintaining,inspiring,supporting spiritual/mental health.