Try to be creative! There are plenty chants you can do, instead of boring your ass off. You may want for example vibrate specific runes for specific goals, like more intelligens, willpower and concentration (my favorite).
Or for increasing psychic abilities extremely well (vibrate ISIS, also my favorite).
Or money. (Also one of my many favorites...i love magick). Always make an affirmation afterwards to program and direct the energy to your goal.
By using "dead time" into something more effective and meaningful, it will help you in the long run and improve your life greatly.
Void meditation will help to relax and still the mind.
Just a few examples.