How to caregive for a family member with cancer?

Wow. Not enough space to answer fully but in a nutshell: be available and supportive but not smothering. Respect the dignity and decisions of your family member (assuming he/she is competent) even if you don't agree. Keep petty family arguments and infighting out of the picture. Go with him/her to the oncology visits if you can. Just be your honest self.