Place strainer (or colander) over a large bowl so that there is at least an inch or two of space under the strainer above the bowl.
Place a few layers of cheesecloth (or strong paper towels) over the strainer. Spoon ricotta cheese on top of the cheesecloth and fold cheesecloth around cheese to contain.
Place something heavy on top of the cheesecloth covered ricotta (such as a heavy bowl, covered brick, etc.).
Refrigerate cheese for at least 4 hours but better overnight if you can. Remove from refrigerator, squeeze the cheese gently to see if any more liquid will drain out, then drain off liquid in the bowl. Use cheese as desired.
SNAPPY TIPS: The longer you can leave the cheese in the refrigetrator, the more liquid you're more likely to drain off. I'd suggest to strain overnight if you can.SNAPPY SUBSTITUTIONS: Instead of cheesecloth, you can use strong paper towels. A lettuce spinner would be a good alternative to a strainer or colander.