New resolution: Eat more dark, leafy greens. Packed with nutrients and high in fiber, chard, spinach, and the like are true wonders of the vegetable world, says nutritionist Cathy Wong, N.D. All leafy greens are rich in vitamin K, essential for bone health, and folic acid, a must for pregnancy that may mitigate depression and cardiovascular disease. What's more, greens are inexpensive and cook up quickly and easily. Try making greens a daily staple, whether in salads, stir-fries, or this broccoli rabe saute. Then turn your attention to the rest of the rainbow.