I'm one of those people who never takes anything anyone says at face value but absolutely swears by expiration dates. Ew the milk expired today?! Eat my cereal dry. The bread smells fine but it says it's not BEST BY today anymore. Go get a sandwich at the deli. My blind adherence to those labels is idiotic but I know how to get better now: follow the rough estimate of this infographic that shows the shelf life of food in the pantry, fridge and freezer.
Yeah, yeah. I know. I'm going from following one piece of paper to following a bunch of pixels. It's not in any way more scientific! But getting the rough idea of how long food lasts is a good thing (in a More You Know way). Like I never knew potatoes and lettuce shouldn't be put in the freezer. Or that honey lasts FOREVER (makes sense though). Or that ketchup 'only' lasts a year, I'm pretty sure I broke that rule many times over.