I look for bananas that are already ripe, they cost a fraction of the cost of green ones. And they are sweet and ready to eat. I avoid all of the other produce that is past it's prime.
I avoid diet soft drinks (costly) and make tea with splenda.
I buy Splenda at Sams Club, it's very cheap there.
I also buy chicken and some veggies at Sams. Some things are cheaper. Other things really aren't cheaper or even cost more. You have to know your prices to get a deal at Sams.
In the summer, I love to buy produce at the farmers markets. Great deals, best quality.