I agree with the good Pastor. I would make sure everything is tuned up and in good condition. While it's a good idea to keep the Sprint in good working condition (and out on the road where it belongs!), however, I wouldn't spend a whole lot of money trying to update it. As Pastor Bob said, a good upgrade might be a different freewheel to better suit your needs, but aside from that, just ride it, enjoy it, get your endurance up, and then when you know what you want go ahead and get that newer road bike. Besides, there's something fun to me about keeping up with (and passing) guys on fancy new carbon road bikes when I'm on my old Schwinn World ten-speed...