I make sure I set up the same way every time and I agree, repetition is key! I try to minimalize how much I have in my pouches because I don't like the weight, and I carry everything in my pack if I'm walking in wearing my saddle to prevent it from falling down.
Left pouch (bottom to top): Linemans already connected to loop, gear strap.
Right pouch: Tether.
I climb mostly SRT, but I'll climb up to my hunting height and set the gear strap. Then I'll haul up my pack, which has my platform attached, and then rappel down slightly and set my platform. Then I'll climb back up and once on my platform, depending on how I want to face, I'll switch to my tether. Then I'll connect my linemans to make any adjustments to my saddle, tether, and bridge to get comfortable. If I'm using my tether, I coil up my climbing line and stick it in my pack.
I was stopping at platform height, setting the strap, hauling pack and setting platform and then climbing up above my platform. But then I'd need to undo the gear strap and move it higher, but with the pack already attached it was a pain.