No two people have the same grocery shopping routine. And while it's nice to have company when you shop, it can take a toll on your pockets. When you're on a budget, it's best to shop alone. If you go shopping with other people you'll wind up with more items in your cart than you originally wanted. This is especially the case for parents who go shopping with their kids. One minute you have five items in your cart and the next you're buying a bunch of kid-related items just because they look cool.