1. Donate your body to science, they'll cremate you for free (https://www.anatomygifts.org/)
and/or
2. Look into natural burial of your remains (http://www.orderofthegooddeath.com/resources/natural-burial)
Preparing for your death now, doesn't somehow influence when you're going to die. But it makes a world of difference to the people that survive after you
1. Donate your body to science, they'll cremate you for free (https://www.anatomygifts.org/)
and/or
2. Look into natural burial of your remains (http://www.orderofthegooddeath.com/resources/natural-burial)
Preparing for your death now, doesn't somehow influence when you're going to die. But it makes a world of difference to the people that survive after you