I freeze all my strawberries and blueberries. Wash, remove stems and allow to air dry. Line a cookie sheet with parchment paper then spread the berries into one layer. Place in the freezer for 6 hours or longer. Then, working quickly, dump1-2 cups into plastic freezer bags. Label with date and amount and place bags back into the freezer. These will keep for 6-9 months or longer if you have a good freezer.
Zucchini is a weed that over-produces all summer long. But if you freeze it, you'll have it ready for bread, soups, meatloaf (I add a cup of shredded zucchini to my meatloaf) in the middle of winter. Wash and trim zucchini. Shred. Scoop 1-2 cups into plastic freezer bags, label and put in freezer. Keeps up to a year. When you thaw the zucchini, water will come out and you'll need to drain.
Acorn squash, butternut and pumpkin are great things to freeze. Preheat the oven to 350 F. Use a sharp knife to puncture each squash. In a shallow baking dish, place the squash and fill with about 1 inch of water. Roast in the oven for 2-3 hours or until soft. Remove and allow to cool to room temperature. Cut in half and remove seeds, then peel. Cut flesh into 1 inch cubes. Place 1 cup in freezer containers, label and freeze. Keeps for 3-6 months.