Research shows you get multiple tasks done faster if you do them one at a time. It also decreases stress and raises happiness.
Shawn AchorHappiness is a social creature. If you try to pursue it in a vacuum, it's very difficult to sustain it. But as soon as you get people focused on creating meaningful connections in the midst of their work, or increasing the meaning and depth of their relationships outside of work, we find happiness rising in step with that social connection.
Shawn Achor