By spending your idle time thinking about important work issues, you’ll be able to utilize extra time and increase your productivity.
Become aware of the times when you’re not mentally productive but physically occupied.
This includes walking to your office, waiting for the bus, or taking a shower.
Spend this time solving a work-related problem in your mind.
Do this only once a week at first and slowly increase the frequency.
Don’t overdo it.
We need the leisure to recharge our batteries and creative energy. So don’t overdo it or you’ll become stressed.