What to do, what to do?

So I have this friend who is constantly messing up her life. Hmmm, seems to be a reoccurring theme to me. Anyhow, I'm troubled as to what to do. How to help? I want to be helpful, but all I know to do is chastise her for her decisions. Is that right? She knows whats right, but she is chasing after things she knows will give her short-term satisfaction, but nothing long-term. She is after the quick fix she hopes will be a long fix. *sigh* All I know to do is to be there for them, and be their friend. ;-) I pray and hope its enough.