I'm sorry if I offend anyone with this, but the best way is to focus on someone else..
I know the feeling. I know it will hurt me if I see things that I don't want to on my ex's page. But still I do look at it, just because I want to see that he hasn't moved on already. This will eventually happen, I know that. So the best way to handle this is being prepared and have someone to catch you when this happens!