Choose fresh, ripe cherries. Rinse them with cool water, pat dry, and remove their stems.
Note: If you have a lot of cherries, this is a good activity to do with a partner or two. If you're alone, settle in. This will take awhile. Listen to the radio, talk on a headset, watch television, or enjoy the meditative nature of a quiet, repetitive task.
Want to make use of those cherry pits? Try making Cherry Pit Vinegar!
You may also want to read All About Cherries to learn more about selecting, storing, and using cherries, or Cherry Varieties (or even Sweet Cherry Varieties) to learn more about the type of cherries you're using.