The on-set of fine lines and wrinkles must be a warning sign for women to start taking care of their skin before its too late. It is best to start using anti aging facial serum when you turn 30. All dermatologists suggest using one such serum along with a good cleanser, toner and moisturizer to prevent your skin from sagging. It is packaged in a bottle with a dropper, so that you do not have to use your hands. Drop a few drops on your face and massage it until the serum is completely absorbed into the skin.