Just say no...it's what we do. Accepting help can sometimes make us feel that others consider us to be incompetent. So, when you offer to help your friend, and they decline, offer again. Be specific and suggest a time a task you want to do.
Leaf Container Get a group of friends together to tackle a big project. Outside is best, then your friend won't feel the need to entertain if they're not up to it.
To-Do Book Buy your friend a book so they can keep track of what they need to do. Go through the lists and see what you can put on their WhatFriendsDo calendar.