A good trick when you go away on vacation is to place a baggie with a few ice cubes in the freezer. If a power failure occurs while you are gone and the food thaws and then refreezes you will know about it when you get home.
Save your store-bought-bread bags and ties--they make perfect storage bags for homemade bread. (Don't turn them inside out. The labels are painted on the out sides of the bags with lead-based paint.)
If you liked those ideas and would like to read LOTS more, check out this site:
http://www.thefrugalshopper.com/tips/kitchen.shtml
