"Instead of having some object of worship we just concentrate on the activity we do in each moment."
Thanks to this book I do zazen every day. I also bring that spirit into my daily job. It's not a clichè advice of concentrating on the moment. It teaches you a deep understanding of transient thoughts.
The day is good, the day is bad, this task is easy, this task is hard, the activity is interesting, the activity is boring, etc. They're not that important. That is merely an opinion of mind. What I learned through practice is I accept them all and proceed with the ritual: right posture, right attitude. That's one of the pillars of life I can rely on and feel peace.