Pinch and hold the bulb holder by its release tab and remove the holder and bulb from its housing.

Do this slowly; during reassembly you will have to put it back in the same position correctly.

While it's not important for a bulb you're going to dispose of, for new bulbs or a bulb you're going to reuse do not touch the glass with your bare hands. Oil from your skin can collect heat and result in failure of the glass envelope. If you do touch it by accident, clean it thoroughly with isopropyl alcohol.