The best way to appreciate something is to imagine yourself without it

I'd like to think I appreciate things well enough, like people, nature, or just simple things in life that I do everyday. There are however times when I forget and things don't always seem like that big of a deal or I complain about stupid things and then I feel bad and I just take a step back and it always runs through my head "what if you don't ever have that again?" and I realize how silly it was and their are people in this world that have nothing or close to it, so then everything seems more important or more beautiful.