I find that for effort in vs output, it's better to spend time on cultivating referrals and if that's not an option, doing seminars or webinars on a topic. Contacting someone to say "I'm going to give you some information for free" and then following up with them is a softer pitch, but often gets past the voicemail loop.You can also look to offer these through local business organizations. Regardless of the offering, don't make it an infomercial. You're providing value for their time to see you as a subject matter expert. At the end, feel free to provide them with contact info and reach out to the attendees.

I don't know your industry, but I can speak for mine (web user experience). There's lots of things I can teach someone that they can take home and implement on their own. But as they get further in, there comes a point where they'd need expert knowledge. I want to be the first person they think of when they say "we need help."

Somewhat of a twist on the traditional sales cycle, but you're still establishing and identifying a problem that they have, and providing them with a solution that is part what you give away and part your services/product.