Learn to say “no”

While setting boundaries ahead of time might help avoid uncomfortable conversations, you'll need to politely decline requests from those who don't understand your boundaries. It is still possible to be polite, for example: "Thanks for thinking of me! However, I will no longer be doing this sort of task".

Practice in a variety of places and situations, such as while talking with salesmen, ordering at a restaurant, or dealing with coworkers. Pay attention to the tone of your voice, as well as your body language and the words you use. Do you have a voice that says "no" but ends with a question mark? Do you find it difficult to look someone in the eyes? Some people may take advantage of these flaws in order to persuade you to cave in.