Here's a recent video where I show you how to quickly apply a preset to a shot using the Gradient Mask. It's quick and easy, and gives you the flexibility to selectively apply the preset to a portion of the photo.
In this example, I apply one preset to the top of the photo using the Gradient Mask, and then add a new layer and quickly apply a different preset to the bottom of the photo the same way.
This gives you a bit more speed when editing than just brushing in the preset. Give it a go!