I have a bunch of various food items in my freezer and I'm wondering if they have been there too long. I have a cooked banana bread that's been there for about a year and a cooked turkey meatloaf that's also been in there a year. I have uncooked frozen turkey burgers in there as well. Which (if any) of those should I toss? And in general, what's the guideline and how long things can stay in the freezer? Thanks.