Here is an excerpt from an article written by Francesca Gino for Harvard Business Review and the HBR Blog Network. To read the complete article, check out the wealth of free resources, and sign up for a subscription to HBR email alerts, please click here.

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This time every year, millions of people across the globe commit themselves to the pursuit of virtuous goals, such as losing weight, being a more understanding boss or partner, obtaining a better education, eating more healthfully, and saving money. But when are such reflection exercises effective? And will your resolutions stick and turn into real changes in your behavior?

Let’s examine each of these two questions. As it turns out, temporal landmarks like the New Year do help motivate us to reach our long-term goals when such goals are salient in our minds. This is because these landmarks trigger reflection and thus can potentially highlight the gap between our current behavior (such as watching TV every night or overspending) and our rosier, desired future behavior (working out every night or saving more). We all regularly face decisions that entail a conflict between choices that primarily provide instant gratification and virtuous ones that mainly provide long-term benefits (watching TV versus working out). As mounting evidence suggests, we often choose what we impulsively want over what we should choose given our long-term goals and interests. (In fact, I wrote an entire book on how we can easily get sidetracked while trying to reach our goals!)

The contrast between our present shortcomings and the hoped-for ideal state that the New Year highlights not only boosts motivation but also helps us meet our goals. For instance, research has found that when individuals who intended to quit smoking wrote about their desired personal future first and then about the negative aspects of their current reality, this contrast was more effective in bringing their actions in line with their expectations than was only fantasizing about future success. Similarly, related research has found that individuals who were committed to the goal of supporting a charity pledged more money when focusing on the discrepancy between the current state (the amount already collected) and the target goal than when focusing on only the amount of money already collected.

It seems that as long as our reflections highlight a contrast between a desired future state and present reality, they should motivate us to act on our goals. Although we can induce such contrasts between current and future goals in many ways (such as by getting feedback from trusted friends and advisors), a temporal landmark such as the start of a new year may be a relatively cheap way to motivate us to accomplish our virtuous goals. Importantly, though, if we feel close to our ideal state already, then the result will be complacency: we will congratulate ourselves for our anticipated achievements rather than take action.

Now, let’s turn to the second question – whether our New Year’s resolutions will actually stick. As it is the case for other points on the calendar that demarcate the passage of time, such as one’s birthday or the start of a new job, the arrival of the New Year generates “fresh start” feelings that can motivate us to meet virtuous goals, such as exercising regularly or finally starting our diet. Psychologically, the New Year gives us an opportunity to wipe the slate clean, and these feelings do inspire beneficial behavior. For instance, a recent study examined gym attendance at the campus of a business school in the Northeastern United States. The results? Gym attendance increased at the start of the year, then decreased over the course of the year.

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Here is a direct link to the article.

Francesca Gino is an associate professor of business administration at Harvard Business School. She is the author of Sidetracked: Why Our Decisions Get Derailed, and How We Can Stick to the Plan. You can check out her HBR articles by clicking here.