Sealing things in the refrigerator, as best you can, will help. If it is a stand alone freezer there are still some things you can do. One way to cut down on the taste change is to fill the containers as much as possible. The less air space, the better. If the food will allow, add a little water to the container.
Casseroles can take a small amount of oil drizzled over the top.
Save the spicier foods for the last couple of weeks. We don't know why this works, but it works very well. You'll find hundreds of free articles to help you stretcher your day and your budget. There's even a free weekly email newsletter. All rights reserved unless specifically noted.