Need help to write a memo to CEO.

Pick a company that has either, in your view, been too unfocused or one that been so afraid to venture from its core business that it has missed clear opportunities for diversification. In a short (1-3 page) memo addressed to the CEO, and playing the role of a strategy consultant, address the issue of focus (too much, too little) and the costs or missed opportunities that you think have been a source of lost value. Advise the CEO on a better way to think about "sticking to his core or going for more."