Same! As you mentioned: "What is my next thought going to be?" was my trigger as well.

If this book seems too woo-woo for some, or the term God triggers you, you should check out a book called Flow by Mihaly Csikszentmihalyi

Here are other meditations that leads me into the present moment:

   - Am I alive?

   - Do nothing for 30-60 mins

   - Who am I?

   - What do I know for certain?