As handy as freezing is, however, it is a good idea to take some care in preparing foods for the cold as it can make the difference between dry unappetizing dishes and those that are as good as freshly made. Cold air slows down, but does not stop changes and deterioration in food. When wrapping foods for freezing, always try to get as much air out of the package as possible and wrap it well so that moisture can't get in. Aluminum foil is a great freezer wrap as are heavy plastic freezer bags. Freezing is also a wonderful time saver.
Ice cube trays work well for egg whites too.
Labels are also necessary for dating the food you freeze. While freezers will keep food for long periods, they won't keep forever. Foods that freeze faster will keep better. Larger crystals mean poorer texture to your thawed foods. Well wrapped bread will keep for about five months in a freezer.