Another thing....make sure you have a power of attorney set up. My dad had made me power of attorney so when he got really ill at the end, I could take care of things and access his funds to pay bills or what have you.
Make sure your executor knows what to expect when you pass. Sometimes you don't know what to expect...do you have cds, life ins through work?
Make sure your executor or power of attorney knows about how much you think you have. That helps them plan for bills and or what to look for. Am I looking for 500 dollars or 50000? Do you have bills or loans that need payment.
Make sure your power of attorney /executor is working for you. That is the person that will make sure you get what you need. I had to tell my dad's "girlfriend" that she wasn't getting any more money. Didn't mind that but you need someone that will make sure you get what you need first.
Also-if you are power of attorney and then they die, all access to accounts stop. I had to wait until the will went to probate to deal with any financial stuff.