One secret to happiness is always having something to look forward to. Life consists of a myriad of paths to be chosen, but knowing a certain path ahead of time can lead to extreme excitement.
These future events come in many forms. I, for example, can look at a calendar and determine that I have a lot to look forward to the rest of the year. Some of these events are best friends' weddings, vacations, birthdays, or even product launches.
I strategically stagger all of these things just to make sure I am constantly in a state of excitement and anticipation. If you'd like to maintain a smile on your face, I strongly suggest you do the same.