My husband and I each have such a binder and our children know who has responsibility for which chapter. Okay, a little more than they wanted from us (!). But it's certainly better than making the kids go through our stuff to find wills, bank account info, etc.
Not long after my father's death, a Twitter friend lost a parent and I shared the contents of my father's post-death to-do list. I promised, but did not deliver, the actual template. Finally, here it is. Modify as needed. I hope it makes the miserable and trying days after the death of a loved one less confusing and stressful.