I want to ride faster double centuries. I see little alternative but doing fairly long intervals at sub-maximal level and tempo riding. In other words, train. There's a difference between riding and training: "riding" is fun, "training" is work. I'm sure training will make me faster, but it's also boring as shit and after a while I begin to dread the upcoming interval session. Do I want to make my favorite hobby, something that I enjoy, work? Would it take fun out of cycling?
I guess I'll give it a shot and see how it goes.