Its not so easy for many, for them the happiness is always in pursuit.. If you are one of those, please identify the persons who have lot of fun, just join them for a day or two. You will understand how they make merry in small things like grand buffet lunch with full team, gossip chat on Tea break, having favourite food at popular restaurant for dinner. All this doesn't consume much of your time, even otherwise, it can be clubbed with your official discussion and certainly it doesn't destroy your work or goals, rather it brings sense of satisfaction in day to day life, not just for you but for your entire team. Still finding it difficult, schedule fun for the day and complete it as a work!