I have a new system lately which has left my long, thin, damaged hair looking shiny and gorgeous.
I mix 1-2 drops Moroccan Oil (the actual MO in the blue bottle) to 3-6 drops Elixir Ultime and apply it to damp hair - chin length to the ends. The Moroccan Oil has more silicones and "weight" and smooths the hair more than the Elixir Ultime alone. The Elixir Ultime is lighter and brings moisture. Together they even out the bad points of the other.
I comb it out with a shower comb and when it is nearly dry, I spray some of the new L'Oreal EverCreme leave-in on the bottle half of my hair.
Soft, gleaming hair, which once looked like straw!