The act of creating is entrepreneurship, not the result.
To add even more advice to a lot of good advice already posted, I would encourage you to learn about sales and marketing as much as anything. The building is just the start. If you build something you still have to sell it. Also, set some goals. If you havent had much success to date I would suggest setting a goal of $100 to $1000 a month or whatever suites you. Now, do the work with that goal in mind. Are you going something that moves you closer to that goal or just writing more code?
To add even more advice to a lot of good advice already posted, I would encourage you to learn about sales and marketing as much as anything. The building is just the start. If you build something you still have to sell it. Also, set some goals. If you havent had much success to date I would suggest setting a goal of $100 to $1000 a month or whatever suites you. Now, do the work with that goal in mind. Are you going something that moves you closer to that goal or just writing more code?