Condolences to you and your family. Many have touched upon many things to share humanitarian, ethics, geek stuff and how to do xyz. Basically everything and anything that has touched your life and made you who you are.
What I would do in such a situation is keep that recorder handy. When you have an idea or something you even think is up there that you want to share, DO IT! Dont second guess, just say/record it! Regardless of what condition emotionally or otherwise you may find yourself in, she will treasure it for the rest of her life.
Wishing all the best,