A wide-ranging study points out that simple public health measures seem to be highly effective at reducing the transmission of respiratory viruses. It recommends implementing the following interventions: frequent handwashing (with or without antiseptics), barrier measures (gloves, gowns, and masks), and isolation of people with suspected respiratory tract infections.
Link to article: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2190272/