Wow, did you really pull out a photography class there?
The law of thirds does not need to be applied to every photo and honestly cannot be expected to be used all of the time. Look at some of the most famous photographers of our time, this definitely shows that the law of thirds can constantly be broken with ease and still create a beautiful photograph as it isn't the "norm" any longer.
The lighting wasn't really something we could do much about. Since this was taken as a candid shot during a swimming trip I wasn't going to wait until the sun was just right to get a picture of my fiancee playing around climbing a tree (not to mention that moment would not have happened until the next day since I can't control the movement of the sun).
The same applies to the background, I don't control what grows on the tree and I don't control which trees at a lake are capable of being climbed up to be out over the water.
Zoom and depth of focus go out the window with a camera phone, just as the process of exposure does not apply to digital photography.
Maybe if we are going to talk photography we should look at photos that are intended to be great photographs instead of someone's snap shots. After all, if I needed that much improvement I doubt I would have spent years as a newspaper photo editor and I probably wouldn't have become a published photographer in several different books on the subject of photography and art. But thanks for the feedback.