Your homepage should give me an overview of what you do, and more importantly, what it means for me. Make sure your important services are easily found on this page and don't put too much on the page - keep it easy for me to find what I want.
What’s your product or service I’m most likely to be interested in? Tell me about it. Reassure me that I’ll not find it better anywhere else. Explain how comprehensive it is and why I should read more about it on an internal page.