Spot Coloring: Trick or Trade?

I recently learned how to do something that I've been trying to figure out for two years now. I worked for the yearbook when I was in high school during my junior and senior years, and always read over the yearbook yearbooks. Basically, for those of you who were not yearbook fiends as I (and I was the mischeivious one, always trying to sneak pics of my friends hanging themselves by another's pool and what not), it's basically the Who's Who of the yearbooks. I'm not saying all the best make it, because we had some material that should have made it into this book. But anyways, you have the idea, surely.
My reason for addressing this, is because in the yearbook yearbook, there was always the greatest trick that I had ever seen with photography. There were several pages, not many, with sports, or a large group in black and white, and only one small part of the picture was colored. The photos didn't even have to be that amazing for them to seem amazing. I had never seen this, not even in professional magazines. Now of course, I'm aware that it's a common trick of the trade, but I still wasn't aware of how to go about it until a few months ago.
I actually found this trick out right before finals week at school. Probably not the best time to discover something such as this, but whenever it had to be I didn't care. I wanted to learn how to do it so bad. It's actually a quite simple process. It actually only takes me around 15-20 minutes, for most pics, some are longer than others. This one was actually my first one that I did. It's of my friend back at school.

I haven't taken any photos for this technique, it's just been photos I had already taken. Actually I did take one photo specifically for this skill, but it didn't turn out quite as nice as I had hoped, so I suppose you may never see it.

It's kind of funny, Matt and Meagan are the only two people I have spot colored, and they're dating and they both are ready for Christmas in the picture.

It's a nice technique to be able to emphasize sports team's color's and moods. You can't force any picture to be spot colored though. You have to just have a good one with all of the right elements and something good to center your photo around. I've figured that out through trial and error. For example, this photo of all my friends at theKentucky vs. Tennessee football game. It has the right idea, the small amount of orange in Kentucky's student section. It has the idea, but the center of attention isn't really there.