This infographic gives a few tips on what to pay attention to before freezing food and provides detailed information about how long to keep each type of food in the freezer. It makes a difference whether you are freezing uncooked or cooked meals, whole chicken or parts, canned or raw fish, etc. There is a also section on what not to freeze.
The infographic is best used printed out and placed in a prominent place in the kitchen. That way you can quickly refer to safe frozen food storage times and make sure nothing goes to waste.