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I received many replies with many helpful ideas. To summarize, many had
had problems with breads getting moldy and/or  rancid. As far as baked
goods like cakes and cookies, many noted that they tend to get dry and
crumbly. The suggestions offered included refrigerating the products
(for things like bread, wrapping in foil or a zip-lock bag first). Many
people said to freeze the bread or cakes for better shelf life, as they
found that refrigerating them can also contribute to the drying out
process. The suggestion was also made, by most people,  to freeze things
like cakes in several serving packages and breads in multiple slice
packages.  (Tomorrow it's out to the kitchen accessories store to buy
some containers for freezing cakes! :-)   Thanks again to all!   Susan