This article will help you understand how to get off the waiting list at Harvard or any other institution. 
WHAT DOES IT MEAN TO BE ON THE WAITING LIST? 
It is a known fact that the number of places in top higher education institutions is limited, and universities like Harvard have lower admission rates than any other institution. Getting on the waiting list can be due to various factors and is greatly influenced by the background, profile and areas of study in which applicants are admitted. Suppose you are a white male working in private equity and you have applied in the third round. In this case, the institution may already be about to fill its places with candidates from similar backgrounds, and while they may like your profile, they may be expecting you and prefer to see a variety of profiles. 
It's important for a student to think about the waiting list from the perspective of the institution rather than from the perspective of what the waiting list says about them as a candidate.
Of course, no one can guarantee that if you perform certain actions you will be able to leave the waiting list, but there are ways to try to advance. on it. As there are no rankings when putting a student on the waiting list, applicants need to know their chances of success.
WORK OUT WHY YOU ARE ON THE WAITING LIST.
As mentioned at the beginning, it is important to understand the possible reason for your waiting list. There are many factors that can affect your waiting list, some of which are within your control and some of which are outside your control. If you don't know the main reason, you will be deluded.
We will only discuss two factors that are within your control.
Profile  
If you have obvious gaps in your profile (e.g. low GPA/GMAT, poor academic performance, lack of work experience, etc.) then working on and communicating these gaps can have a significant impact on your getting off the waiting list.
Applications 
If there are no significant gaps in your profile, you should check your application with current/former advisors/students to see if there are any gaps in your history or essay. It is important that it is checked by someone else, as there is a good chance that you are biased in what you have written and you may need help to see the gaps.
TIPS FOR GETTING ON THE WAITING LIST
Make a deposit at the institution to which you will be selected. If you can't get into the university you want, don't feel bad. There are still many top business schools ready to welcome you. Always proceed wisely and apply for admission to the next university. This will guarantee you a place at the institution, even if it has no refund policy. 

Make a clear decision about your place.
You should first decide how badly you want to study at Harvard. 
If you remain on the waiting list with no intention of studying at the institution, you are essentially taking the place of a student who would love to study there.
However, if Harvard is still your true preference, be sure to stay on the waiting list, as you still have a chance of being accepted. If financial aid is the deciding factor for you, most of it is probably already distributed among the enrolled students.