Revive Active Health expert, Dr. Fiona Barry, offers her top tips for improving well-being without going overboard. Get into nature. Spending time outdoors can have huge benefits on our physical and mental health, with even short walks in nature known to boost energy levels. “One of the richest sources of vitamin D comes from direct sunlight, so as well as spending time outside in the winter months, it is recommended that we make up for the lack of natural light at this time of year.” Supplement your diet.”