I know what you are thinking, and that is NOT what I mean! Anyways, that would be a method of making money, not saving! By give it up, I mean give up something you do every day, for one day a week. One day a week, give up your car. Use public transportation, walk, bike or carpool! Give up your daily shower one day a week. (Or 3 or 4 days. Trust me, your body will regulate itself without a shower every 24 hours). Give up your morning latte for a cup of drip coffee, or hot tea. You'll still get your caffeine fix, but it won't cost you $4. If you eat out more than once a week, stay in one of those nights! Cooking an awesome meal for yourself will cost only a fraction of what it would cost to have someone make it for you! Can you save your errand that you were going to do today until tomorrow when you have other things to do? It will save gas and an extra trip! If you can find it in yourself to give up more than one thing, or give up something more than one day a week, your savings will only get better! Get creative! Pay attention to the things you do every day, and ask yourself, "Can I go without this today?" You'll find yourself saying "Yes" a lot more than you'd think! Good luck!
PS: Obviously this doesn't apply to knitting! Do that every day!