Extreme Cheapskates

I was flipping through the channels yesterday and noticed a show on TLC titled "Extreme Cheapskates."  I had never watched it before, but vaguely remember hearing about it.  I decided to stop and watch it.  I caught a few episodes and throughout it I was thinking, "I love to save, but I would NEVER go to that extreme to save a penny."
They did have some good ideas like unplugging things that are not in use.  I notice on some tvs when they are not on they have colorful lights or a red light on until you turn the TV back on.  You are using electricity to keep that red light on, but how much does it save you in a month to unplug unused electronics?
Another thing that I found interesting was people in the episodes had outdated appliances and cars.  Things were not made as energy efficient back in the day.  I would think that it takes less energy to run things now then before.
I will say they were resourceful.  They used banana peels to shine there shoes and coffee grounds as a window cleaner.  I won't be trying either, but thought it was interesting how they really put everything to good use.
What tips do you have to save money besides using coupons?