How did you get your first paying customers, and how long did it take you to go from idea to your first sale?<p>Please elaborate on:<p>- Sales/marketing efforts that you thought would work, but didn't pay off.<p>- Something you wish you would have known sooner.<p>- The most effective way to get customers that you discovered, and how you discovered it/got it to work (for example trial and error, domain expertise, advice from a mentor, etc.)