Just wash them and remove any stems and or blossoms.
I think the most important thing for the cucumbers is to keep them as cold and fresh as possible. I grow my own so I like to pick them early in the morning, before the sun is on them, wash them and get them pickled an hour or so after picking. If I can't do that they go right into an ice water bath in an ice chest. You can keep a cucumber fresh and crunchy for a while but you can't resurrect one that's soft and wilted.