(Mostly copied from what I just posted in the SOTD)
OK, soak/wet the brush, squeeze it out (no need to shake after) add a couple drops of water to the soap and start loading. If nothing happens, or the sound is really pasty, add some more drops. Load until sound becomes pasty - add a couple drops - repeat.
Do it, until the lather on the puck is the way you want it! That's correct, none of that proto-lather nonsense - the lather on the puck after the load should be shave ready!
Now your brush is fully loaded and the lather inside your brush is too dry. So take it to your face/bowl and now you can build the whole lather by adding water - good soap (IMO) take a lot of water. I prefer mostly paint motions to build, then dip the brush into water, then a couple of circle motions to mix in the already hydrated lather on the outside with the dry lather from the inside of the brush - and then again paint strokes to build.
The lather is fully hydrated, once you see the first small bubbles and you can't mix them back in any more. The lather is glossy and shiny and the addition of a bit more water will collapse it. It is a personal preference, if you want to take your lather that far, I know most straight shavers do and I also prefer my lather drippy like that.
Hope this helps and enjoy
