Besides Airbnb the products I use and love are: * Dropbox * Quora * Uber * Hipmunk * Evernote I also admire Square for their simplicity.
The most rewarding part of entrepreneurship is seeing your creation make a positive impact on the world.
The major mistake that the entrepreneurs make is not having the willingness to get their hands dirty and do the hard, unglamorous work that it takes to launch something successful.
1. Do things that don't scale.
2. Solve your own problems, because chances are, someone else has the same problem
3. Make something for yourself