The 'rice' usually picks up the taste of the sauce you have with it so usually you won't need to season it. In this case, the Coke (diet, right?) should provide the flavouring. Otherwise, fry it up with some chopped onions, a bit of salt and pepper...whatever you might season 'real' rice with.
Normally what I'd do is fry some chopped chilies and garlic in oil, and then use that oil to fry the rice. You could also use just toasted sesame oil to fry the rice too.
Oh, and soy sauce is always good too, of course. Throw in some grated carrot and some peas.