Stay hydrated
Apart from lots of obvious benefits from keeping the body hydrated, such as maintaining good work of joints and muscles, or better moisture of the skin, drinking at least 1.5 liters of water a day can help you stay more healthy.

Highly professional research has shown, that state of dehydration decreases the innate immune function, which is responsible for the first response when a pathogen enters the organism. That state can lead to an increased number of common cold and minor health problems.