Use the following audio sessions to get more intimate with your breath. Listen all the way through first, just observing your breath. Then take each part as you go and make a few notes in the logbook. You can download the PDF and type straight into it, no need to print.
Here is the first exercise we did - this is an oxygen advantage technique.
Breathe light (to breathe right)
Here is an audio and the Oxygen Advantage PDF for the exercise