Think about what specific aspects of the business generate profits and where your costs lie. To rapidly expand, you'll want a multiplier that greatly increases profits or drastically cuts costs.

As a thought exercise, think about what you'd need to do to double or triple your sales. A bigger marketing budget? Institutional clients? More staff? Content? The details will depend on the specific nature of your business. Once you have one or more scenarios laid out, work backwards and figure out what's required to get there. The result will give you a good idea of what investments to make to grow your business.