Everyone always covers the general stuff :)

- Email opt-in for coupon, to get people to hit email confirm landing page offer.
- SMS opt-ins and confirmation offers, they cost money to send but can be worth it.
- Recurring email video series can do well in the right markets.
- Using API's to access and promote SaaS services.
- Video micro billing for higher quality videos, downloads, or multi-device.

That's my quick list... got any that you would add?