I freeze homemade freezer jam, but if I don't have time to make jam, I freeze the berries in amounts for a batch of jam...turns out just as well in freezer jam. Boxed baked treats like ding-dongs freeze well and can be taken right out of the freezer and dropped into a lunch bag...they'll thaw by lunchtime. Cook 10 lbs of hamburger when it's on sale and portion out in baggies for spaghetti, sloppy joes, casseroles, tacos. You can freeze tomatoes straight from the garden (well, wash them first!) then drop them whole and frozen into your spaghetti sauce.
@ksgoodie I totally forgot about hamburger! I love to cook a bunch up like you do, also do it with shredded chicken breasts. Makes for a lot of quick meals!