In Florida especially, there is often harsh sunlight to deal with when making outdoor portraits. In the above example, I was working with a model on a portfolio shoot close to sunset time. Having such an abudnance of light, I decided to make it an element of the photograph. Putting the sun partially or entirely behind the subject can create a very strong, backlit effect. Depending on your lens and position, some lens flare may be visible and add yet another element to the image. I still used a speedlight off camera to frame right to help get enough exposure on the model then let the sun do the rest in the background.
Instead of fighting against the sun, try working with it to create unusual lighting effects in your portraits.