Well, the above mentioned are only tips. We shouldn't confined
ourself to these as THE ONLY solutions to EVERY breakup. If they
don't want to do either then there is no point doing it. They can
find other methods to help themselves get out of the emotional
rut.
There are other stuff like spirituality (if you are religious)
which I did not mention because religion is a very sensitive topic.
There is also hypnotherapy.