the focus on the knives is not wasted time at all imo. Nothing worse than being time poor and knives not ready to fillet fish when the weather comes good and you have a haul to clean up.
another good one is pre made off shore rigs if you’re into that style of fishing. I run heavy wind-ons to a glow bead and snap swivel. From there I have those little green leader hoops that I wind a bunch of 100lb paternoster rigs onto with some 20lb dropper loops for the leads. Having a shed load of those types of rigs done when it’s rainy makes the days on the water more enjoyable.