My old writing mentor always said there were two ways to introduce a character, through personal narrative, or through an action sequence.
In personal narrative, stress your character's point of view. For example, "Monique was having a bad day. Not only had her boyfriend called and cancelled their date that night, but as he was doing so Monique had distinctly heard a girl giggling in the background, and she was sure that it her own best friend, Shelly!"
So, we know that Monique is angry, upset, her boyfriend is fooling around, and her best friend has stabbed her in the back. All that in two sentences! The next paragraph would deal with Monique's grief, and her physical description could be included in that, too.
In an action sequence, your character appears as a player. For example, "Brad swung the car around the corner, the Bally loafer on his right foot smashing the accelerator to the floor. The Mustang's engine responded with a roar of power, the wheels screaming as the rubber melted under stress, speed, and friction. The car's ragtop roof suddenly popped off and sailed away, and the air made his blond hair dance in the sudden breeze. A bullet sailed past his face, so close it nicked his neck; a crimson river on alabaster skin."
So, we know that Bradley is caucasian, drives a Ford Mustang, dresses in fancy clothes, has blond hair, drives very fast, and seems to be chasing somebody who is firing a gun at him.
Hope that helps.