Saw this post by Jeff Vogel talking about "The 10000 hour rule" and felt quite touched. If you search on the net and you will find lots of info about that too.
I have copied the quote from Ira Glass below, hope you enjoy it as I do. You got to have faith with what you are doing. Although your 1st X Apps/Games won't be the best seller or Top 25, the experience is helping you to get closer to that. Just keep working on it, do a lot of work and never give up!