Many underestimate the necessity of exposing yourself to natural sunlight for at least 5-10 minutes a day. A persistent lack of sunlight can lead to negative psychological symptoms such as anxiety and depression. At the same time, not everyone lives in a climate that gets much sunlight. If you can’t spend some time outdoors each day, using a sunlamp for 30-60 minutes each day can help. It’s not a perfect substitute, but it’s certainly better than nothing.