When it comes to unique strategies, you should think way outside the box and not be afraid of "risk." Working with other local small businesses can help with cross-promotion, but sometimes that's not enough.

Here are some examples I just thought of off the top of my head:

1) Get in touch with any personal injury attorneys and ask for referrals. Give them 10-15% of each client they send your way.

2) Find any outdoor events in your area (ex. marathons, triathlons, mud runs, etc...) and set up a booth at the event. Give free massages and offer info to your potential clients.

3) Take advantage of social media. Search Twitter for people near you who are complaining about back pain. Tweet them and offer your services with a 10-20% discount for their first appointment.

If you're interested we can set up a call and I can give you more strategic ideas once I learn more about your business and efforts up to this point.

Hope this helped!

-Matt