Over the past week, I have heard the sad passing of three people we knew... my wife's late brother's friend, my classmate and best friend during primary 2 Religious school, and the father of our close friend.
The first 2 shocked us, as they were at almost the same age as us. Uncle was 60+ when he passed.
Whatever the causes of their passing, Allah knows best, but we as Allah's humble creation should always remember that we will not be spared. Our time will come. We will not know when, but what we can do is prepare for the next phase.
Different beliefs have different needs or preparation. In my belief, there is an afterlife which InsyaAllah will be secure for us provided that we obey all our obligations to Allah and leave those that Allah forbids.
In terms of worldly preparations, I believe there is no difference to the different beliefs, but rather to the attachments with whom we will leave behind. In most cases people would ensure that they leave behind a roof for their loved ones, and education to prepare for the rest of their life. Of course, those with additional income will ensure they leave behind wealth to ensure their loved ones have something to start with.
I often cried quietly on hearing these news, on losing friends and also the thought of what if this happens to us. It will inevitably happen, so I have to constantly remind myself to prepare.
Inna lillahi Wainna Ilaihi Rojiun (Truly we belong to Allah and to Allah we shall be returned).