I guess I just don't understand how meditation can do things like change your happiness.
Consider what happiness is.
Is it a goal? Not really. Doing something that makes you feel happy isn't, usually, in and of itself making you happy. Take reaching a weight training goal. Does benching benching twice your body weight make you happy? Put another way, does moving a metal bar fitted with weights make you happy? Again, not really. It's that you've reached a certain level of strength, which increases your self-worth, that makes you happy.
The point of my previous paragraph is that the "what" of happiness isn't always that clear. Most people go through life trying to find happiness without ever knowing what it is.
Consider being scared out of your mind. Does that sound like something to be happy about? No? Then why do people go to scary movies (such as A Nightmare on Elmstreet, Saw, and Steel Magnolias)? Again, happiness isn't that clear-cut.
How about getting the crap beat out of you? But what if you just won an MMA match?
To take it even further, there are people who hate weight training, horror flicks, fight-related sports.
So the parameters of what is happiness can be nearly anything, depending on who the person is.
I've always thought of conquering what was making you angry or sad to do that.
So if parameters of happiness are dependent on, and relative to, the individual, then no specific action or activity is intrinsically happiness.
I've come to the conclusion that happiness is based in one's ability to be happy with what they have and how much they chose to feel about events as they happen.
I believe it's Bohdi Darhma what said (and I quote badly), "He who is happy with what he has is rich."
There are poor people who are happy and rich people who are not. The poor person is happy because his wants are simple and the wealthy person is unhappy because he wants even more.
Dealing with the events of life is the next crucial part. Your happiness can, rather obviously, be disrupted by things that make you unhappy. But what constitutes something that makes you unhappy?
How about getting run into by another person so hard it rocks you? What if you're a defensive linesman and you just prevented a sack?
Like happiness, things that make you unhappy depend on you and how you
choose to perceive them.
Take getting cutoff on the freeway. When it happens, do you choose to see it as an eventuality of driving with others or as a personal attack? The facts of the incident remain the same. Another driver came into your lane without signaling and right off the front of your bumper. The only difference in the example is how you choose to perceive it.
Ultimately, those are two of the important things that meditation does for you. It helps you to focus on the good things in life, while not ignoring the bad, just putting the bad into proper perspective. Put another way, puts you into a positive mood and helps to ensure that things don't unnecessarily pull you out of it by increasing your tolerance.
It's a long post, but that's the gist of what meditation can do for you.
New drinking game: every time you read the word "happiness" in my post, you take a drink.