 The important thing to know is that it's more effective if this variety that you're adding takes the form of experiences rather than stuff that you buy. The thing with material things is that we do habituate to them faster. Sherr says dishabituating can foster creativity and engage the problem-solving part of your brain, and it can also increase happiness. Because in a weird way, the thing about change is that it can help you notice the parts of your life that are constant.