Well, I'm not sure what a good method is to make a band, but I know a really bad method on how to fail in doing so.
I had a friend who I was quite close to. We listened to a lot of psychedelic music and whatnot, loved bass-dominant music in particular. I was skilled on the guitar already, but he didn't know anything on how to play. (not to insult him; he'd just never picked up a bass before.) So, we decided to start, anyway. Needless to say, the bridge was never crossed between our abilities and he just gave up on me.
Sorry for tooting me own horn. Just make sure you're all at about the same skill level is my advice.