I thought I was pretty Facebook savvy, but I ran across a post on one of the blogs that I follow on how to prepare your Facebook account in case you die.  In a few simple steps you can prepare your account so that someone can take over your account, turning it into a "legacy account".  

Giftie at Giftie Etcetera has done a wonderful step by step (with images) tutorial which you can see by clicking HERE.

Overview of the five simple steps:

After step #4 you will get a pop up similar to this shown below (my personal information has been blocked out), asking if you would like to send a message to your "Legacy Contact". 

My Facebook account is ready to go should I die - one less thing that family members will have to deal with....  

In regards to other social media - I have all of my log in information stored with my will to help make the process a little bit easier when I am gone.  If you would like to read about this in more detail, please go to Facebook's Newsroom Article on this subject (they also show the steps to add this from your mobile device).