Revisit every place you’ve played your film in advance of release (all film festivals, community screenings, etc.) and consider how you can bring them aboard as a partner to blast or otherwise promote your release. Most film festivals have a vested interest in promoting the success of their alumni films and their careers, so you can likely get inclusion in their newsletter etc that includes a link to purchase your film.

If you are working through an established distributor, find out if they have “affiliate programs” in place  (meaning your promotional partner can share in a percentage,usually 5 -15%, of the revenue generated by the link from their website), and  find out if you can extend those affiliate programs to your promotional partners. You can also set up DIY affiliate programs yourself through services like Amazon Payments, but the set-up charges are not cheap and probably won’t work for a one-off film. However, if you are building yourself as a BRAND, and expect a slate of films that you can promote, affiliate programs are a must.