Step 7 – Replace Fast Food with Meal Prep. I know it can be hard to pack lunches instead of eating out, but if you have a plan in place you will save your wallet and your health. Let me show you how to replace those unhealthy fast food lunches with nutritious, delicious lunches you make yourself. Don't worry, you won't be in the kitchen all day! This is a simple easy way to take your lunch every day of the week with minimal prep time.