As a relative newcomer to the business (1 1/2 years), I came in at a time when the use of LEDs was becoming well established. In fact, I am near exclusive use of LEDs. Still, I was influenced by the best wiring practices of halogens. I remember reading an article by Mike Gambino about the great care he takes in balancing voltage to fixtures.
So I must admit that I am probably "wasting" wire and labor in still trying to somewhat balance voltage even though LED technology tells me it is not necessary.
(I am using methods similar to what Bernie describes above.)
Starry Night Lighting
"Always look on the bright side of life."