We're in an antiquated industry (oil & gas) providing a B2B data-subscription service, so this may or may not be relevant. I've seen similar methods work for B2

We're in an antiquated industry (oil & gas) providing a B2B data-subscription service, so this may or may not be relevant. I've seen similar methods work for B2B direct services in manufacturing, and in B2B and B2C product development services as well. Anywhere we can find up-to-date titles on executives in organizations is very effective for leads generation. Linkedin, Manta, Businessweek biz listings, or ASKINT (cold-call with sole intention of finding out "who's in charge of XXX", build the lead and get the name only for concentrated calls later) all have been effective. We have identified companies of a particular genre previously, and targeted particular titles in those orgs. I personally like running a Manta scraper and vetting results by hand with Linkedin to confirm current titles. I strongly suggest getting Rapportive for Gmail for snooping networks associated with email addresses. If you want to get really snoopy, Maltego is a great tool for looking for connections elsewhere on the web. We have also found trade-shows to be fairly effective at having companies self-identify as needing our service and providing contacts that you have early rapport with to help you find your guy in their company. More effective for bigger business development deals (which can distract as much as help, in my experience), but was moderately successful for us. Bonus of tradeshows: company listings of all the competitors. Generally these will be great lead-list starting material that you can vet down to be high-quality leads (again, in our industry)