According to a recent study, lead generation is the number one goal of websites. I recommend this Case Study from MarketingSherpa.com (despite being e-commerce in nature) because the concepts explained will help you improve your websites lead generation results.
MarketingSherpa’s Buyer’s Guide to SEO Firms
121 search engine optimization firms profiled – including handy comparison chart and index by clients. Plus tips on how much to pay, estimating ROI, and avoiding dangerous practices that can hurt your rankings.