I found that trying to play cover songs as close to the studio version(as long as they played with a pick) helped me get my pick attack more consistent. First song I ever learned how to play on bass was Chick Magnet, by MxPx. The bassline sounds really cool, but it's extremely easy to play, and Mike Herrara plays with a pick, so his stuff is pretty much what I learned pick attack with.
edit-now that I think about it, Chick Magnet is actually what I'm playing in my avatar
