Ever since I was a child I've enjoyed listening to and composing music. Often with no real tools to do the latter, I usually just took the melodies of whatever video game was being played around me at the time and reproduced them on my little Yamaha keyboard by ear.

Now, my mind is filled to the brim with music that wants to get out there, and I'm slowly learning the tools to make it happen.
Right now I have the iPhone/iPad app MusicStudio, and Garage Band and FL Studio on computers.

I prefer composing to arranging, but I'll likely do both.

TL;DR: I make music loops.