Let's start off with a bang, shall we? Saving on food is probably the easiest or the hardest way to save money, depending on your circumstances, and how much you've been spending and how much you want to save. It's really up to you.
If you're already frugal with food and know how to cook a lot of things from scratch, the journey might be a little harder because the bites you can take out of the budget are smaller.
On the other hand, if you're used to stopping by somewhere and grabbing something for dinner on your way home from work, or filling your freezer and cabinets with meals ready to eat, you can shave a lot right off the top with the next grocery shopping trip.
Does that give you a clue as to where to start? Good, then, let's go.