basically there are a few approaches

some people group by functionality, some people by voice, some people by most used, some left to right, some top to bottom

it's mostly a matter of which one works best for you though!

"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia

Utility modules are the dull polish that makes the shiny modules actually shine!!!

sound sources < sound modifiers < modulation sources < utilities