My mother's dad used to seperate the 2 plys of toilet paper onto seperate rolls.
I always buy damaged boxes, if they are there. (There is usually a spot in the freezer section for damaged boxes too...Frozen blueberry pancakes for 25¢ because the corners were crushed in!)
I limit make-up use to 5 days a month.
I refuse to buy anything unless it is on sale.
I put the unpopped kernels of popcorn from the popper back in the bag to be popped next time.
Save all the bits left from bar soap, put them together to make a new bar of soap.
I changed all my bills to e-delivery. (Most companies give you a $1-$5 discount for doing this.)