Hi John,
some additions to greco's great post (that's a really geeky idea with the visualization plugin there!):
I do a lot of walking meditation. It takes a bit of getting used to, but once you are able to keep your eyes fairly steady on the path in front of you (not dancing about all the time), the flickering visual "vibrations" become quite evident - and I'm *not* referring to the optical illusions that arise from e.g. watching a stream flowing, and then watching a stationary image.
Something else I like to do is to take a "typing break" at work every hour or so (I have my computer set up to remind me of these): I'll stand up and stretch my hands and shoulders for a few seconds, then sit and allow my eyes to focus on objects in the distance, then near me, then again in the distance, and so on. Besides being relaxing for the eyes, this allows me to watch out for vibrations in the "middle distance" either way. This is not quite "all the time in daily life"... As to clear comprehension, well, I'm working on it

Sounds are a good place to look for vibrations. And the breath is full of harmonics to tune in to, as it were.
Cheers,
Florian