I have the same problem.
From what I read from many psychoterapy books I understood that it is a common problem.
We do not know how to properly live in the present moment.
Of course if something is very interesting, like computer game, we can concentrate at it. But most events of the day are just boring...
Only week ago I found and read the good old book called "You're in Charge: A Guide to Becoming Your Own Therapist" by Janette Rainwater. In it you will find the explanation what is going on and what to do