One main focus for the end of the year is to finish up as many things on your to-do list as possible in order to focus in the new year.
The new year is new. Everything that remains on your to-do list is something that pulls you in a certain direction. With nothing on your to-do list, you have nothing pulling on you so you are free to choose the direction you are going to go.
Removing something from your to-do list does not necessarily mean that it gets completed. You can simply choose that the item is no longer valid. The removal is letting go of the pull to get it done because getting it done does not serve you.
Wrapping up your to-do list means you can plan the new year with a blank sheet.