Bruce,
I'm in the same boat as you, always looking for ways to build smarter.
I'm not trying to go fast in order to make money, or just for the sake of going fast.
This is a hobby for me, and I suspect you are after the same thing: I don't like to spend 8 hours on something that should take 4 with the right techniques and tools. It's not that I am unwilling to spend 8 hours on it, I certainly am, and will enjoy it. It's that I can tell when I am not working efficiently and it drives me nuts.
I also have a job and a 4 year old daughter. Time for hobbies is limited.
Here are a few general things I have done that have made tasks easier and quicker for me, and most importantly, have made my results turn out better:
Take a class if you can. If not, watch the DVD's. There are a lot of good tips in there.
I try different techniques and tools for many of the tasks and take note of what seems to work best for me. It's slow at first because some stuff doesn't work, but it will pay dividends later.
I have especially cut down my brass and lock polishing time by trying different combinations of files and sandpaper to find what works for me. I think I could do an even better job, and quicker, with some better fine files than I have. More file work, less sandpaper work.
I also go through all the tutorials on this site, and look at any thread such as this that might have techniques in it.
I am a slow builder, and that's okay. I would like to improve my efficiency, which would give me more time to slow down on the artistic side.
I've probably spent as much time or more looking through the tutorials and threads here on the forum as I have spent actually building my first two rifles.
I guess I'm saying what the others said, learn the skills first and efficiency will come. I think you knew that and you said you are willing to put in the time.
That's about the only answer I have!
Cheers,
Norm