1. Subscriptions–  Companies like Netflix have created entire markets with subscriptions. You may not know the first thing about streaming media, but is there something your customer needs frequently?   Service subscriptions, product subscriptions, warranties?

2. Memberships–  Can you offer an immense amount of value regularly to offer memberships?  Hey, Sam’s Club made a membership model out of retail! If they can charge people to shop in their store, you can certainly come up with something much more valuable to your current customers or reach a target market who would otherwise not be your customer. 

3. Training–  Your expertise is highly valuable. What types of training can you offer your industry or your customers that you could charge for?  For example, if you make service calls, is there a way for you to offer your customers a portal so they can repair their own product?  Can you offer training for your staff and then sell it to competitors outside your area?

Can you digitize your own expertise and offer it to the public? There are lots of people who do this and even more people who are willing to pay for the knowledge, especially from someone who has done it or is an expert.