If you're thinking of other things you're telling your mind ok this is not important. Sure it goes in but getting it out will take longer. The main thing to do is come back to the chant to keep the conscious mind from becoming overactive. If it does an IVBA will show that you are generating too much alpha waves suppressing the connection. It will give you the feeling like "everything you know about the book you got from the preview". You miss out on the I know this feeling.
Keep the mind busy with the chant rather than letting it wander off if you want to strengthen the body mind connection faster.
Alex