Happiness is just a state of mind. Think happiness and you'll feel happy. But it could be better if other people see you smile as if problems are just too easy for you to handle. How you are comfortable with yourself, how you view things in the morning, how you relate with other people, and how you control yourself in some things contribute to your everyday happiness.
First is personal hygiene. Taking a bath in the morning makes one feel comfortable not just with oneself but in mingling with others too. It takes away bad vibes and makes you think positively. Good body smell makes other people comfortable with you. Where is happiness there? The mere fact that you are comfortable with yourself and no negative comments about your personal hygiene from the people you encounter with are enough. It further boosts your self-confidence.
Second is positive thinking. Problems are man's daily companions but they have solutions. Always think that God is always with you to help you settle your shortcomings in life. They must not prevent you from being a happy person of the day. Difficult it may seem but it is possible to smile at your difficulties in life, but never leave them unsettled for it may worsen without you noticing it. Being pessimistic from the time you wake up can surely ruin the rest of your day.
Third is action. Can you be happy the whole day by just sitting at your favorite chair? Of course not unless you are a computer or television addict to name a few. If you have work, then do it wholeheartedly with a smile. You can chat with your mates from time to time about some good news, but not all the time for you might neglect your responsibilities. Remember, we are social beings - we never live alone. Sometimes going out with friends can be one of your most stress-releasing activities. Though drinking is inevitable, do it socially and moderately. Remember, you are there to enjoy and not to be a drunkard and a burden to your colleagues.
Finally, self-control. Too much of something is bad like over eating and drinking. Also, uncontrolled temper over issues with other people can surely create another big problem that can entirely ruin your day. So, calm yourself down and be a good listener if you want others to listen to you, too.
So be happy. It is free, It is all up to you to be. No need to spend a lot of money for some little things can brighten your day. But of course, if you have some budget for something you like, go for it. Anyway, money can be earned and not a problem to those who are hardworking.