Using the Sort feature (by category) will get you some knight gold of the way but not all
Setting up: Before we start focusing on what buffs to use knight gold, you should arrange your trade skill buffs in your knowledge book so you can easily build your hot-bars and put new buffs, gained at the beginning of each tier into the book. Using the Sort feature (by category) will get you some of the way but not all.
As of writing this, we still get Artisan-buffs (geomancy, apothecary etc.) these should be going as there is no longer any recipes that uses these techniques, so lets pretend they don’t exist when arranging your book.
Here's the index of my trade-skill pages:
Page 1-2: Main skill buffs (currently 7 rows @ level 70)
Page 3: Subclass buffs (4 rows, 1 page for 2 x 2 rows)
Page 5-6: Artisan buffs (6 rows, 1 each for the 6 classes outside your subclass)
Your main skill buffs are the buffs that use the technique your class dictates.
Arrange the buffs in rows by tier and in columns by effect so that the
First column contains the buffs that reads "... is increased at the cost of some power"
Second column contains the buffs that reads "... is increased but ..... is lowered"
Third column contains the buffs that reads "... is increased but the chance of success is lowered"