I'm the sole founder of Oxbridge Notes, <a href="http://www.oxbridgenotes.co.uk" rel="nofollow">http://www.oxbridgenotes.co.uk</a>. I describe my job as "hacker, founder and janitor". I do it all - graphic design, programming, server administration, customer service, seo and online marketing. As someone who doesn't mind working alone and loves learning new disciplines, I couldn't be happier taking on all these roles.<p>I set up the site a year and a half ago out of desperation after a previous project had failed. I asked myself "what do I have that I could sell n times?". The answer: my old notes (revision notes compiled by myself, not lecture handouts) and essays from Oxford law school. I combined my knowledge of law with my knowledge of programming and found a suitable niche. There were many competitors but none of them had the overlap of skills I had, and so I had a huge advantage.<p>Last year the project made ~$25k profit, and this year I hope to reach $50k, with an investment of about five hours per week. (The initial time investment was huge, but it is in maintenance mode now.)<p>I recently began offering notes in other subjects. If you happend to have typed-up revision guides from college, I can offer you a chunky commission on every sale: <a href="http://www.oxbridgenotes.co.uk/sell_notes" rel="nofollow">http://www.oxbridgenotes.co.uk/sell_notes</a><p>For anyone familiar with real time strategy games like Command and Conquer or Starcraft, Oxbridge Notes is the turret guarding my base. It gives me the minimal income I need to survive, giving me the chance to leverage my time by taking on riskier but potentially more rewarding ventures.