Now that you have decluttered your room and have learned how to be more effective, is there another area of your home that you can help your mom out by decluttering? She might have too many books on the bookshelf, too many magazines with recipes that she may never get to.
Look around your home and see where there is “too much” of something. Brainstorm and even internet search ways of improving that area. I am sure your mother will be blessed by your eagerness to help out in ways that she might not be able to get to because of her season of life.