An article from Entreprenuer.com outlines ways you can use speaking gigs to connect with your target audience. The first thing to do is track down your target market and then find an audience within that market that might benefit from what you have to say. The article mentions Chambers of Commerce and industry associations as examples. Once you have the opportunity to speak, make it count by offering solutions to real problems, collect contact information, etc. This strikes me as particularly useful advice for business audiences, but may be adapted for others as well. Read over the article for more tips and advice.