Writing about the death of a loved one may help boost immune function and improve overall well-being, according to a report from Harvard Medical School. The key is to express those deep emotions in an outward way—even if you don’t share your journal with anyone. The report recommends writing about 15 minutes a day for as long as you find it helpful. Of course, this won’t replace visiting with a therapist. But too many people tend to bottle up those feelings of loss—which can lead to health problems later.