About the only thing you can do FOR her is to lovingly stop making it easy for her to avoid change. She may find others to enable her, but you can't do anything about that.
It's very difficult to detach with love, but it can be done. You firmly set the boundaries, you don't allow yourself to be manipulated (and she almost certainly will try--by attempting to make you feel guilty, for example). You express your love for her at the same time.
You have to be prepared for her to be angry, to blame you for any problems she runs into, and you have to be strong enough to say, "I love you, but it's time for you to make your own choices."
You can avoid giving advice unless you are asked for it.
As I said, it's hard to do those things, so keep coming back here for support.