I've been wanting to do something like this for A LONG time, especially after seeing all of the inspiring blog posts. With my sewing machine missing a necessary part, tasks requiring a thread and needle often take twice as long, so I've been holding out.
Here's a bit of a twist on what you've probably already seen in the blogosphere -
Here's a little tutorial:
For the bows:
Cut a part of the collar and fold it.
Take your needle and pull thread through the center (where my fingers are) and wrap it around a few times.
Use leftover pieces of the polo to make strips for the center of the bows.
Just wrap them around the center, over the thread, and stitch it up.
After that you can attach them wherever you want.