Fun with hue and saturation

I tend to push the images a little more by playing with the Hue/Saturation tool (Ctrl+U). I don’t have a particular rule on how to use this tool, so I just play around with the settings and see if I can create an interesting colour scheme. Note that it’s easy to overdo it and ruin the colour balance you’ve already achieved in the image, so either save your work first or work on a new adjustment layer.