During an open water swim, it's easy to lose your direction. With all the splash, it can be quite hard to see the next buoy, so I look behind it for something bigger, like a tree or a building, and aim for that instead.
I was good at swimming until everyone started to grow. The best swimmers are really tall with great big shoulders, and that just isn't us. But then a big, powerful swimmer isn't going to be so good on the bike and the run.