Almost all of Paul Graham's essays. Especially

How to Make Wealth - http://paulgraham.com/wealth.html How to Do What You Love - http://paulgraham.com/love.html Inequality and Risk - http://paulgraham.com/inequality.html

and Paul Buchheit's

My startup path - http://paulbuchheit.blogspot.in/2007/03/my-startup-path.html (I have actually printed a hard copy of this and have it my wallet. This is what finally convinced me to join a startup.)