Summary:
With an inexpensive puck of shave soap.
Practice making a lather, add too much soap, too much water, too little soap too little water.
Add all the soap at the beginning or dribble it it bit by bit. Touch it smell it rub it rinse it.
Soap or shave cream work it play with it so the lather is exactly what you like.
I suspect those that try adding dribbles of water to their current end of shave lather will
find that the amount of water that can be worked into the lather is underestimated and the
thickness of that wetter lather to be a better lather...
Boar or badger brush start light on the water then add dribble by dribble.
Before rinsing all the lather down the drain after shaving try to see just how much
more lather is left in the brush. Add dribble after dribble of water and work it.
I tend to shave with a 'good enough' lather but by playing with the brush and lather
after I shaved my notion of 'good enough' improves.