I framed walls on most of the remaining walls. There are a couple where I will use the existing frame. To attach the bottom 2x4 to the floors, I used one of those powder-actuated nailers that use little bullets and you hit them with a hammer. I've used them before, they work great, made by Remington. After that it's just standard pain in the ass wall framing.
Then, I ran all of my wires. Due to anticipated high amperage, I used 4 gauge wire (for this particular wire I used aluminum because copper is so damn expensive right now) and ran a line from the takeoff lugs on the building's main panel back to my garage, and mounted a subpanel. I also used an existing wire to connect a fan-forced heater and mounted it in the framing... nice and toasty in there now. I ran all the wires for three big fluorescent light fixtures with a 3 way switch in two places, 4 small spotlights (for above where I plan to build a workbench and where I plan to have my big roller tool chests) controlled by a switch near where the workbench will be, 9 normal outlets, and 1 line for a 220V wire for when I get a compressor, hopefully not too far in the future. This is all managed by a 15 amp breaker for all the lights, three 20 amp breakers for all the outlets, and a 40 amp breaker for the 220V line.
Here is some pictures with most of the walls done being framed and most of the wiring done.
