Use a good conditioner each time you shampoo. Apply a quarter or dime-sized amount of conditioner, depending on the length of your hair. You want to use enough to coat the strands of your hair without weighing it down. Gently massage it through your hair, focusing on the tips, and rinse out with lukewarm or cool water.
If your hair is extremely dry, you might want to consider a leave-in conditioner as well. This will protect your hair from drying out during the day, helping it stay shiny and manageable.
If your hair looks dull and lifeless after conditioning, you might want to switch your conditioner. Look for one made with nourishing natural oils and free of silicones.