Using a Physical Trigger or Motion to Keep Your Attention Focused

To keep yourself from drifting off while you are listening to something
or to keep your mind from wandering while you are observing
or experiencing something, you can use the trigger you have created
or any gesture or physical signal to remind yourself to pay attention
to what you are hearing or seeing.
For example, every 20 or 30 seconds, click your fingers softly,
move a toe, or move another part of your body as a reminder. Once
you decide on the trigger, practice this signal to make the association
with paying attention by repeatedly making this gesture and after
that focus your attention on something. Then, that gesture or motion
will become your trigger to pay attention.

After a while, should your attention drift away, simply repeat
the trigger to bring you back to attention again.