Too Long; Didn't Read
LinkedIn has a good conversion rate - both large funds and top investors respond to emails. This article explains how to look for investors on LinkedIn, and what should be in the first email to get interested in your project. Take your LinkedIn profile seriously - sometimes it is this profile that will decide whether or not to respond to your messages. Get to know more about the investor- what he does, who else he invests in, what's going on with him, and how you are connected to them: directly, through mutual acquaintances or not connected at all.