My mate has started running a small house/electro night and there's a few of us involved with it. The night itself is doing well, so we want to sell some music online under the same name to increase promotion. We're not looking at vinyl, just digital. Anyway, I've sold stuff online before and had a half decent return from it, but what sort of techniques have you guys employed to sell more music? There's the obvious sending it to radio stations, youtube channels, splatting it all over facebook and soundcloud etc, but what else?