I figured this might save you a bunch of time, find more fans and maybe make a few extra dollars next time you release any music.
About 2 year ago I committed to releasing a single a month. I did it for little over a year and documented the entire process.
I also go over why releasing singles is the best option for indie musicians, how to prepare your files for distribution, which services to use to distribute your single on iTunes, Spotify, etc, where to promote your single, and more.
Check it out: http://musicgoat.com/sell-your-music-online