All you need to do is find a big fat jar and whenever you find yourself with a $5 bill, you should do your best not to spend it. Instead, immediately put those bills in your jar once you get home. Of course, this might be best for people who tend to use a lot of cash. For those who choose to pay for purchases with cards, you might not find your savings growing as quickly as you'd like. Do you have other savings tricks to share?