First it is important to know your peel, will you be saving orange, mandarin, grapefruit, lemon or lime etc.
Make sure you wash your peels well. If you can, try and use organic sources, this way if you are putting them in your compost it will be better.
If eat kumquat, the peels make a great marmalade. By cooking the chopped peels with sugar syrup until it's syrup. Usually you boil for twenty minutes.
Lemon peels are the most used peels. They can be used for a bath. Or even to rinse your hair.
Orange peels placed in a bag of brown sugar will keep the brown sugar from getting hard. Make sure the peel is as clean as possible.
Grapefruit can be used instead of lemon or orange peels. The peels also make a great marmalade.
The citrus peels are also a great way to flavor water.
Also place citrus peels in a sachet and place in your sock drawer for fresh smelling socks.
Citrus peels also do great in your compost.
Chewing your citrus peels can also freshen your breath.
And last but not least use peels to clean tar off your shoes.