I used to spend my day doing it.
Being away from the net for a month reduced that very much.
I took the habit on only checking if I have an important mail once everyday.
Now I kinda forget to check it. Being outside training all day long certainly helps, as well as not having a job at the momment.
A big long break of not checking at all will definitely kick that habit out. Find out how much more relax when the world takes care of itself