First you need to choose something in the novella to which you can relate. Is there anything that brought back a memory to you when you read it? For example, does your family do anything during the holidays to help the poor? Or are you involved in some sort of organization that donates food during the holidays? You could relate this to the story. Scrooge, of course, does none of these things at first, thinking only of himself and saving his money. But at the end, he gets "scared into the Christmas" spirit by the ghosts, so he changes his way and becomes a huge philanthropist. You could explore that angle.
You might also choose one of the characters. How about the nephew, Fred, who is a happy-go-lucky guy and tries to have a good time during the holidays in spite of his sour uncle, who turns down his invitation. Perhaps you have some relatives you would not like to be around over the holidays, but you suck it up and do so anyway for the sake of your family?
Or perhaps you could choose Bob, who is a hard worker, but loves his family, and his family is more important to him than his job.
Or, maybe you know someone like Scrooge?
Hopefully, this will give you some ideas. See the link below on enotes for more help getting ideas.