I'm guessing you've heard the term bucket list or kick the bucket. A bucket list is a list of things you want to do before you die. How to write a bucket list is simple, getting started is the hard part as most people don't like thinking about death avoiding it at all cost. The bucket list is about living not dying.
The answer on how to get started is don't think about dying rather think about the things you could do if nothing stood in your way. If thinking about death is something you're comfortable with by all means take it into consideration as for many the image of time is a great incentive motivating us to live life while we can, seize the moment making the most of every opportunity arising.