The correct answer to this open question is the following.
Between Winning the Election and the Inauguration, the elected president has a lot of activities, basically preparing his government and cabinet members for the next four years.
First, the newly elected president has to form a transition team that is going to receive the information from each department. Another important thing that happens is that the elected president is going to be protected by the Secret Service.
Next, it is time to select the staff that is going to work in the White House for the next four years. During November, the elected president has to decide who the members of his cabinet are going to be. This is a critical decision moment because he has to select the best.
The Inauguration Day is January 20, and on this day the new President takes the oath.