Once again, 24 hours can be very fruitful. I had the chance to answer my own questions, or at least in part, thanks to another friendly sub willing to share from experience. Summing up their words:

As for submitting without cyber...

-being available to Him as much as life allowed
-conveying my need for Him through writings, completing the tasks He gave me, sending a picture to Him He wanted (takes a lot of trust)
-writing lengthy stories about a certain fetish of His,
-finding pictures on the net that He had a certain kink for, but didn't have time to look for
-writing in a Journal for Him.
-If we agreed to be online or talk on the phone, we made sure ahead of time as best as possible, that we could both fulfill that commitment. If for some reason we couldn't, an email or call at the very soonest available time was made to let the other know. But that didn't happen often as we usually knew all the what's and when's ahead of time.

It took much focus and energy on BOTH our parts. He was always consistent, following through with what He said He would do, pouring as much of Himself into me as I was into Him.
If one is going to muse, this subject is worth the effort.