Is there any superstitious method that can be used by people who always dream about their death at night, such as putting things at the bedside? Red cloth?

The so-called dream is a kind of psychological image and a kind of karma. According to Zhou Gong's book, this dream may be caused by someone's death or being treated anxiously by others. I'm not sure about the details. The scientific approach is to work and rest regularly and relax appropriately, such as doing sports or traveling, or eating some calming food and fruit. Superstition is to buy a pair of jade pendants and put them on the bedside (as for what jade, what it looks like and how to put it, please find some famous feng shui or fortune tellers), or change some furniture, so you can chant Buddhist scripture at ordinary times, even if it is red cloth, it is ok to hang it in front of your house.