The only thing that is really known to matter that affects the
progression of Hep C is avoiding alcohol. People with Hep C probably
should drink zero alcohol.

In terms of cirrhosis itself, it's hard to give a general answer to
this, as a lot depends on how severe the cirrhosis (from any cause) is.
 If the liver is doing okay, there probably aren't specific actions
that make a big difference. With severe liver problems, certain measures
may reduce the likelihood of bleeding from esophageal varices or of
developing hepatic encephalopathy or kidney failure.

From a prior thread, it sounds like the person was not tolerating
treatment with interferon. (And that they were being treated with
interferon suggests that the cirrhosis is not all that severe, since
most people with decompensated cirrhosis are not treated.) Intolerance
of interferon is a common issue, but if at all possible treatment with
pegylated interferon plus ribavirin is preferable to going on to liver
transplantation (not to suggest that the treatment works anywhere near
100% of the time). Patients frequently have severe depression with
interferon, and around here are often started on antidepressants at the
same time interferon is started.

I think support groups and medical providers who take care of a lot of
Hep C and are used to the drugs' side effects can sometimes get patients
through the course of treatment better than when these things are not
available. I don't know how things are set up in Canada, but I'm a fan
of having people with Hep C treated at major liver centers whenever
possible.