Give us a small sample. Or no one will be able to help you.
Basically think of it as painting with light. 95% comes down to whether the light is right or not.
Easiest place to shoot will be outside on a cloudy day or early morning/late afternoon.
Indoors theres alot to think about. Using multiple light sources will fuck you up because they all have different colour temperatures(quality). Best way is to turn off all the lights and use tungston worklights or better.
And you'll most likely need post production work. Cant help you there
Now, give us a sample bitch