Sometimes my fridge gets crowded, which makes me forget about things I have in there until they've spoiled. I hate throwing food away, and not being able to see everything that's in there is the culprit. Enter lazy susan.
It's so simple! You use these in your pantry and spice cabinet, so why not in the fridge? Adding a lazy susan (like this one from Target for under $20) to your fridge lets you spin to see what you've got. Use one in your bathroom under the sink for toiletries that get lost under there, or on your garage work bench for small jars of nails.