In terms of maintaining the finish and clear coat of your frame keeping the frame clean and clear of debris will be the most important. There are a few products which we have found to be useful.
Pedro's Bike Lust is a great example of this it includes a light solvent that will not damage the finish and silicone polish to protect the clear coat from surface scratches.
Windex works well to remove any kind of build-up that frames seem to accumulates.
Soap and water work as well.
Just avoid any cleaner that is oil based or caustic.