Here on Vimeo, you can find many well made and comprehensive color grading tutorials. Those get into grading your footage properly, adjusting every single aspect of your image, with masks and multiple curve layers and other techniques.
This is the lazy, "I don't want to spend more than 30 seconds grading my shot" approach where you aren't making a film, but just touching up the image quickly as possible. So here I just decided to put in the most basic aspects of flattening out the image and coloring it for cinematic appeal. Mind you, this is only one look / style.