I am not adamant about this, but I don't really understand the necessity of knowing what chainring and sprocket one is riding on at any given time. Whenever I come up to a stop (if I plan on putting my feet down) or a hill I shift down a couple sprockets in the rear and leave it at that. However, I rarely take my feet off the pedals at stops, I instead balance in a trackstand or similar and find that accelerating from a standing start is much easier, regardless of what gear I am in. Once you ride your new setup for a while you will develop a "feel" for what gear you are in and be able to shift accordingly without the visible confirmation. Of course, if you find the indicators to be absolutely necessary, others have suggested various contraptions to help you with that.
Cheers
lverhagen