I have been meditating vippasana-style for months and recently decided to give shikantaza a try.
My question is this: in vipassana when I was distracted or lost in thought, I always returned my attention back to the breath. It was my stable reference point.
In shikantaza, I'm not sure where that reference point is. Since it is an objectless, choiceless style of meditation, where do you return your attention when you find that it has wandered?