I too, as a born in, never considered my own mortality, until just after I left I was having a chat with an XJW lady, and she threw in the remark that " We all have to die".
That shocked me rigid, but I knew she was right. From then on I began to think seriously about it, eventually became comfortable with the thought, and happy I was no longer deluded. I also learned to live each day to the full, and to take real control of my life's direction. I could no longer wait for god to do his bit.
We do only have the one life, but we can make it a good one, live it to the full, and really enjoy it.