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If you have a sarcastic comment you can deploy in many different situations, practice it regularly on different people to memorize it.  For instance, when someone asks a common question like, “What’s up?” you might reply with “The sky.”  The frequency with which you should practice your sarcastic comments depends on the strength of your memory.  If you can memorize the sarcastic comment after practicing it two or three times daily, there’s no need to practice it more than that. If you need to practice your sarcastic comment more often before you can memorize it, do so. If your comment regularly gets eye-rolls, don’t use it anymore or use it less often.  If you have a go-to sarcastic comment that seems to be a big hit, work it into regular use. Remember, even good sarcasm can be overused. The best sarcastic answers or comments will draw on your deep knowledge of your audience and their preferences, attitudes, and beliefs.  Think carefully about how you can work your immediate situation and the conversation of others into a clever, sarcastic comment. For instance, imagine you and your friend Joe are big fans of the Hulk.  If Joe accidentally breaks a bunch of fragile dishes, you might say sarcastically, “You saved the day again, Hulk!” Spending time listening to people who are well-practiced in sarcasm will help you be more sarcastic, too.  Pay attention to when and how they utilize sarcasm.  Listen to the inflection in their voice and the facial expressions they use when being sarcastic. Being sarcastic takes time, focus, and experience.  As you exercise your sarcasm “muscles,” you will become better at being sarcastic.  Keep trying to use sarcasm, even if you tell a few jokes that others think are not very funny.
Practice your sarcastic comments. Take note of the reactions you get when practicing a particular sarcastic comment. Be creative. Talk to sarcastic people. Don’t be afraid to fail.