Wasting Food
A favorite story of mine from childhood, that I heard from a teacher or from my parents: when we die and go to hell, each will be given barrels of food that they wasted, in all its glory over the years. Only after finishing them all can one be granted reincarnation back to Saṃsāra.
I am really reluctant to throwing away edible materials.
P.S. I lost my Internet connection, and I am using public Wi-Fi to post this. I feel kind of relieved when I was removed from the Internet for several hours awake. Now I am not sure if fixing it would be a good idea.