Salmon and other fish

Most kinds of fish are loaded with B vitamins, particularly the renowned stress fighters B6 and B12. In fact, B12 is one of the most important vitamins in terms of serotonin production; a vitamin B12 deficiency can even lead to depression. Omega-3 fatty acids are prevalent in salmon (Alaskan wild is the best; farm-raised is the least desirable) and tuna — even the canned stuff. Grill or pan-roast fish, and serve on a bed of leafy greens with a side of lentils and carrots for a true power meal. Or, toss rinsed and drained water-packed white albacore tuna with a tablespoon of extra-virgin olive oil and a teaspoon of drained capers and serve on a bed of salad greens. You'll be doing swimmingly after meals like those!

How to Save: Canned salmon and wild Alaskan tuna are great buys, especially when they go on sale. They last almost indefinitely in your pantry.

Lean beef

Surprised this is on the list after hearing admonitions from experts about avoiding the red stuff? Don't be. Beef is a substantial stress buster. It's loaded with zinc, iron, and B vitamins (not to mention protein), all known for keeping us calm and happy. It is also satiating, meaning you feel fuller longer (hunger pangs can cause irritability and anxiety). Avoid fatty cuts, and stick to lean cuts like flank and skirt steak, and 95 percent lean ground beef. Or, look for cuts marked "round" or "loin," such as top sirloin, bottom round (great for pot roast), and tenderloin — they are the kindest cuts in terms of fat content. And limit your intake to 4 to 6 ounces when you do enjoy it.

How to Save: Meat can be pricey, but luckily the leanest cuts are also the least expensive. Supermarkets have weekly specials on cuts like London broil (perfect for quick grilling or slow pot roasting) and bottom round. If you have room in the freezer, unwrap the meat and rewrap it in freezer paper or wax paper, then place it in a freezer bag to reduce the chance of freezer burn.

Leafy greens

Spinach, kale, dandelion greens, turnip tops, and Swiss chard — they're all amazing foods that provide iron plus lots of vitamin C, both good for strong bones, teeth, and hair, and vitamin A and magnesium, both of which are excellent at helping you maintain calm. Sauté one or more type of greens with lemon or orange juice and garlic, or purée with a little low-sodium chicken or veggie broth and white beans for a satisfying soup.

How to Save: Fresh, loose greens are generally less expensive than washed and bagged. Frozen spinach is a fabulous bargain. Stock up when it's on sale and store in the freezer for up to three months.