I produce when I'm stressed out.. I don't know why but that's basically the only time I feel like I can get anything worthwhile done, my tracks improved a lot the last time I was on tour, now I'm doing a "chillstep" [lul wut] track to spite my brother, it's coming along pretty nicely.
When I'm really into it I usually work on two or three tracks in one go, swapping back and forth usually brings out the best and the worst in a track instead of having your brain just get used to everything that's going on and making it sound good simply because you recognize it. IMO.
I used to go off in all directions, like I'd be looking for any one kind of sound in my synths or samples, a nice hat, a riser, a pad, what have you, and end up finding tons of shit that sounds good and gives me an idea that I just have to check out, and I'd forget about the original vision right away. That doesn't happen so much any more, I'm a little more focused on getting the core elements down and then I usually sing or hum whatever it is I want to make, if it's a melody I plot it down in FL keys or something similarly simple, just to get it down "on paper" before I mess it all up again as I try to fit it into different synth patches or whatnot.
I might sound like a bit of a fag in the process [as I sit alone in my room going "WhooooOOOOOOUOUOUWOUWOUWOUWOUdakkadakkdakkadakkadakkadakkadakkaPISSSSHHHHHhhhhhssss!! .... Unts unts unts unts!!"], but I'm confident in my sexuality and entirely okay with this.