Happiness for me can be just as much reflecting on the awesome things that have happened to me in the past, and where I am now, as much as it can be looking forward to the future.

I don't think there's something wrong with setting "happiness" as a goal - I think the important thing is separating that goal from other ones. So not attaching "achieving happiness" to "when I get a raise," instead just looking at internal things you can do to "be happy" in whatever situation.

But exercise, good diet, and not being in a stressful situation does help.