Obviously, technique is the most important part of stropping. If you are lifting the spine, or applying pressure: the number of laps one does on the strop makes no difference.

Also, for myself personally, I have learned to rely on tactile and audio feedback to know when "enough is enough" during stropping.

Here is a neat little gadget that may help those wanting to track the number of laps when stropping.
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I stumbled across these Knitting counters today when I was wondering aimlessly through Jo-ann Fabrics, while my wife shopped for ideas. Small & cheap .

Some quick thoughts: don't try to juggle the counter with the same hand thay holds the razor, use with the strop tension hand. This is really only important if you want to closely track the number of laps. I once tried counting my laps, but could not abide the amount of focus it took away from the most important part: TECHNIQUE! So if adding a counter to the mix would be distracting, just carry on without it.

I hope this was helpful to some!