It's hard to really articulate what the parameters are that make one song parody-able and another song not, but if I can come up with a good enough idea for it, I go for it, and if not, then I have to move on.
I have very mixed feelings about it. On one hand, I’m concerned that the rampant downloading of my copyright-protected material over the Internet is severely eating into my album sales and having a decidedly adverse effect on my career. On the other hand, I can get all the Metallica songs I want for FREE! WOW!
I write and write and write, and then I edit it down to the parts that I think are amusing, or that help the storyline, or I'll write a notebook full of ideas of anecdotes or story points, and then I'll try and arrange them in a way that they would tell a semi-cohesive story.
I was able to come up with a couple articles for the magazine, I was able to solicit help from a bunch of my friends to contribute pieces: Patton Oswalt, Seth Green, Emo Phillips, Chris Hardwick, John Hodgman, and more. It's very much a "Weird Al" themed issue, so I'd like to think that there's a lot of "Weird Al" flavor throughout but I think it'd be generous really to call me an editor.
It fit pretty nicely into my schedule because we'd pretty much finished the bulk of promotion for Mandatory Fun and were just getting geared up for the World Tour so this was a nice time for me to be working on it.