Life is the greatest thing everyone takes for granted. You never know when you're going to die.
Pretty much everything. It's just a general assumption daily that 'nothing bad will happen' so you can't help but just not really focus on how lucky one is to be alive and having all your limbs, and being healthy....it's sad, but, true. You only start to realize how precious things are when something bad does happen.
I don't currently take anything for granted. At least if I do, I'm not aware of it. Off the top of my head the only thing specific I can think of that I took for granted is my keychain.
I personally find this hard to believe