If eating less take-out or cooking more healthy meals at home is on your list of resolutions for 2013, check out the 8-inch Wüsthof Classic Ikon Carving Knife ($120, zappos.com). The fancy German kitchen tool is an investment, but it’s one that could help you mix more fruit, vegetables, and lean meats into your diet. And hey, those dollars you’re dropping on delivery sure add up. Kitchen already stocked with a nice set of knives? Download the Kitchen Knife Skills app for the iPhone and iPad ($5, itunes.com). It’ll help you pick the best knife for the job, whether it’s slicing an avocado or a slab of meat.