What are lead generation strategies that are little known, put very effective?

Don’t mention the usual: affiliate marketing, PPC, PPV, forums, ect. Provide links to posts which explain strategies. What outcomes have you been able to achieve?

most blogs regurgitate the same lead generation strategy or speak in very general terms. For example they will write, “mobile marketing, facebook, social media.” I am looking for unusual less talked about but effective means of generating leads.