Generate more visits and revenue from your best customers.
Offer to create for them a monthly (or weekly) personal “surprise” box. All they have to do is come into the store when they get the alert that the new box is ready. There they can open their personal box and if they like what you prepared they can buy it at a discount.
A subscription service for authors that for a very low price ($1/month) gives the readers access to all the books the author has already written. Other facets are can include:
1. Sneak peeks at new books.
2. An online (and offline) community of like-minded people sharing their thoughts.
3. A communication channel for and to the author.
The point is not so much to make a profit out of this monthly fee, as much as to build a community of raving fans that can be monetized by other means like selling special editions, swag, etc.