Add cucumber slices to a clean 1-pint jar.
Add salt, dill and vinegar. Close the lid and shake to distribute ingredients. (Liquid will not cover cucumber slices. Don't worry. The salt will draw liquid from the cucumbers in a couple of hours.)
Place the jar in the refrigerator and remember to shake it once or twice in the next few hours.
In about 6 hours, you'll have delicious, crispy pickles.