Leveraging an outbound/inbound sales strategy. Meaning, you blast cold messages (outbound) to prospects with simple call-to-actions that compel some % of them to become (effectively) inbound leads, asking for more information and dropping themselves into the sales cycle.
I created a course that shows startups how to put their lead gen on autopilot -- it's the most popular thing I do as a consultant so I turned it into a standalone product.
Check it out here: Sales Hacking.