I hope that you won't mind my answer. The answer is quite simple, go with the flow and think of yourself as a 'dead person'. Think that you don't feel pain or grief. This way, you will be able to concentrate on your work and a little return (which is always definite) will make you happy.
Isn't this funny? I mean nobody has ever asked me for advice, it's first time and i really want to know if i'm good at giving advices.