Colour is my primary focus during post-processing. I have a very specific idea in mind for colour and mood. For me, post-processing is an attempt to achieve that idea.
I've used a few different processing techniques. For a while I did all of my post-processing in Photoshop, tweaking settings and playing with actions until I found the look I wanted. Lately I've been using Lightroom exclusively. The VSCO presets for Lightroom are my favorite things right now.