Not too long ago I have come across one article which I assume you can find interesting. Someone will take a steaming dump all over it, but it answered some of my questions. 
<a href="http://www.prorame.ch/21-years-old-one-of-a-kind-useful-essay-themes/" / rel="nofollow">http://www.prorame.ch/21-years-old-one-of-a-kind-useful-essay-themes/</a>