They stay active. Exercise endorphins are potent mood lifters. A single session (as short as 20 minutes) can boost spirits for up to 12 hours.
They get enough iron. For best absorption, take your vitamin supplement with food and make sure it has 18 mg of iron if you’re premenopausal (up to 16% of women in this group are deficient). Female soldiers who took iron supplements scored better on mood tests than those on a placebo, a study found.
They write in a journal. Every night, write down three things that went well for you that day, no matter how minor. Be descriptive and note the role you played in making each happy moment happen. You’ll be increasingly mindful of how much control you have over the bright spots in your life.