To appeal to the western mind, here are some tangible benefits I have achieved(And you can too) through meditation and zen:
* More appreciation for small things
* Less stressed over everything
* Lower blood pressure
* Far better ability to focus (A cure for my ADD)
* Better ability to express myself rather than just playing social games that we don't even realize we're playing
* Being more of a completionist and caring for the things I work on
To name a few.
Meditating daily also increases the grey matter in your brain[1]. That alone was good enough reason for me to start my practice.
[1] http://www.neurobiologyofaging.org/article/S0197-4580(07)002...