How a tour gets from concept to implementation varies as widely as the type of music that is out there.
I've done stuff where tech "week" was a month in the shop. Places like Upstaging and
PRG (among others) have space in their shop to test and rehearse tours, even up to practicing the
build of the rig and the loading of the trucks. I've also been on a couple things where we used the
house rig and had to re-program the
desk every show.
Take business classes, take drafting classes, learn about electricity, even geometry will help (what is figuring a
beam angle/field at a specific
trim but geometry?).
But the biggest thing is to meet everyone, learn to
network, learn to be a team player, and never dismiss an opportunity simply because the money may be less than adequate.