Yes to all of the above
Zip ties and Zip Tie anchors are great to have
I would not say shorter wires, I would rather like to use the term per-messured. its when you have a mix of long and short wires going to the same area that it looks a mess. Its better to go slightly longer than you need, than trim to fit your work
Tech Flex tubing is a favorite around here to dress up your wiring, heat shink is also worth considering, specialy since heat shrink is offten used to close up ends of the tech flex.
Not always a good idea, but done right, some well positioned tape all that stands between a organized wire job and a rats nest.
It is also useful if you forgot to use heat shrink tubing down and need something to organize wires or close up separating ends of tech flex or for insulation
In case you need to splice wires and want a solder-less solution