You have been granted a bit of magic. There are no specific rules for what you can or can’t do with it, but the quantity at your command is limited, and you have no idea when it will run out. You also have no specific guidelines as to what sorts of things will use up a lot of your magic, and what sorts of things use up only a little.
You are told that more powerful mages than you are already working on world peace and putting an end to hunger and disease, so you don’t need to worry about that.
What are the first three things you try to do with your magic (and in what order), assuming it lasts that long?