If you haven't read Paul Graham's essay on startup ideas, and why they should address problems that really exit, I suggest: http://paulgraham.com/startupideas.h

If you haven't read Paul Graham's essay on startup ideas, and why they should address problems that really exit, I suggest: http://paulgraham.com/startupideas.html http://paulgraham.com/startupideas.html Some product like Skype, Facebook, Dropbox spread just by word of mouth. They address pain people really feel (for some, you might need to dig deeper what it is). Other products need national TV commercials and still have a hard time to sell what they have. Big difference.