Great advice. Best thing to do is be direct.
I think people who talk too much are a little bit "Coo-koo" to not realize that are talking non stop. I just avoid these people, stop returning phone calls etc. and they go away after a while.

I have a family member who does this and when she traps me in one of her boring 90 minute stories (that could be told in 3 minutes) I interrupt her and say "I have to go to the bathroom" and quick to say my goodbyes. No one ever questions needing to go the bathroom.
I'm starting to teach her that I prefer text instead of phone calls and I notice she's texting more...Thank God!