Roller, roller ,roller it will help "iron" out the soreness.

A knee exercise (a little hard to explain)
sit on floor
bend knee so foot is flat on floor
take your fingers and lightly press against the muscle where it ties into the top inside of your knee. While lightly pressing/touching contract the muscle for 2 seconds, release and repeat several times. The reason you touch the muscle with your fingers it to trigger the nerves and basically say "hey muscle, I am talking to your" Sometimes when we contract our quads we are just using the larger part of the muscle and those little fibers get lazy. Whenever my knee starts to bug me I immediately go back to doing these a few times a day.

A good PT will be able to get you on the right path to working out the kinks.