Tightwad is just watching "Supermarkets Inc: Inside a $500 Billion Machine" and a shopping expert has just revealed the top three ways to keep your bill low:
1) Do not take your kids to the market with you.
2) Do not use a cart, carry everything yourself.
3) Buy your groceries with a $100 bill - not credit. Parting with it will hurt!
What do you think?