Canders I agree with Mandy to extent, there is no rhyme to bad things just time and unforseen circumstances. Not helpful I know, sorry.
As to how to help others just make it clear you are there for them that's all anyone can do. Even if this only means to listen to how hard it is for them. Or to be a sholder to cry on. They don't expect you to have the answers just to be a friend when in need.
This is what I need just as much as I needed to be left alone to heal when my daughter died.