I just happen to be looking at some advice on making oneself happy and ran into this list. Pay particular attention to the blue examples on the list. Some of these require more explanation than is provided, but it’s a good start for someone who just wants a starting point to making yourself happy.
Remember that being happy begins with you. If you feel as if you are stuck in a rut, you might be able to get yourself out of that rut by changing something simple. Look around your house. Does it need cleaning? Take a look at your car. Do you feel uncomfortable every time you get into it because there is so much junk? Take a look at your timecard at work. Have you been working nonstop for months without a break or putting in hours above and beyond everyone else? Sometimes a good cleaning out of one little aspect of our lives–our houses, cars, or minds–is just the little push that we need to get us out of that rut. Good luck!