The following are my top blogs at the moment. They are different and discuss diverse issues but most importantly, they leave an impact after reading.
A professional and mature blog that discusses board level or strategic aspects of business. The blog is written by Mark Suster, an ex entrepreneur and now VC. Written with flare, the blog is interesting to read, direct and covers various topics of interest.

A blog with a sense of humour! After endless emails and long-winded meetings, a giggle is much appreciated. Mike Michalowicz is a serial entrepreneur that has moved into consulting business and delivers regular good reads through his blog, discussing various key points from start ups, to quality as well as marketing.