Over the years, I've heard any number of suggestions about changing one's perspective in order to get a more interesting photograph. Out of all of them, the two that have tended to work best for me are, 'Look up!', and 'Look behind you!' During my fat years, I avoided shooting from a low position as much as possible. I'm going through a thin period at the minute, so perhaps I should shoot as many shots as I can from ground level before I hulk out again...