First off, these tips will be referred to as my BFTW from now on.
So my BFTW today is this: Be aware that when grocery store deals say 2 for $5, for example, you do not need to buy 2 to get the deal. You are entitled to buy one for $2.50. My rule of thumb is if it's a staple in my house, I get both, otherwise I buy one and then wait for another sale before I buy it again. Cuts down the bill and the amount of stuff you need to store at home.