I don't know if this helps, but when I do anapanasati meditation I tend to follow my chest expanding (and feeling the breath enter my lungs), and I also focus on my stomach muscles contracting and expanding. With each in breath (into my lungs), I acknowledge it as an in-breath, and when I breathe out (and feel my muscles push the air out), I acknowledge that as well.
Also, I know this is sort of an obscure reference, but I found that when Noah Levine (author of Dharma punx, the American fellow who is a follower of Jack Kornfield, http://www.dharmapunx.com/htm/mp3.htm
) described "soft-belly" meditation in his dharma talks, that made it a lot easier for me to figure anapanasati out and be able to meditate much longer than I used to because I have stuff to focus on rather than go "shut up mind!".
best of luck!