Watching a good friend going through a divorce is tough. I can't imagine being her. And being a non expert of the subject, I resorted to the most obvious thing a girlfriend can do to help lessen the pain.

I took her to the mall for a shopping spree.

And by gosh... it worked. Well,... of course not entirely, but it worked. And I guess, deeper than that, as we roamed in the mall, we talked, and the combination of those two yielded a very good result.
Sometimes the dry joke of life is dryer than Sahara. As I just bought a house with my boyfriend, she's selling her house and splitting it with her soon-to-be-ex-husband.
But she marches through, and I'll be holding her hand till the end.