"I have learned to seek my happiness by limiting my desires rather than attempting to satisfy them." - John Stuart Mills
"When I was 5 years old, my mother always told me happiness was the key to life. When I was at school they asked me what I wanted to be when I grew up. I wrote "happy". They told me I didn't understand the assignment, I told them they didn't understand life." - John Lennon
"Happiness is a direction not a place." - Sidney J. Harris
Material things and luxuries are not what make you happy. What makes you happy is giving up those luxuries and material things for the good of others and knowing that you do not need them.
What makes you happy inside is not just doing the job but doing the job right. Until you have sweaty palms and your brain aches you are not doing the job right.