Here are some samples:

1) Cook boil-in-bag meals in dishwasher (takes care of dinner and dishes at once)
2) Cut your own hair (noting the bad job will keep your invites and expenses down)
3) Spend your spouse's money and save your own
4) Walk through stores with your hands in your pockets
5) Live in a tent
6) Turn a busted microwave into a mailbox
7) And the dog idea? Bath with your buddy to save on the water and water heating costs.

It never occurred to me that was a money saving tip!