Homework:
Look at - http://www.nikibrown.com/designoblog/2008/11/24/my-day-in-logos-boston-edition/ & http://best-ad.blogspot.com/2008/08/evolution-of-logos.html
Read - http://www.logoorange.com/logodesign-A.php & http://www.logodesignlove.com/logo-design-tips & http://www.vice.com/read/william-gibson