Not having the right tools has always been my downfall.
I recently got a Stewmac guitar setup tool kit that does the job.
I've found his stuff to be rather overpriced though.
I do have a work bench with a vice that has neoprene cushions but, I usually get by with various improvised ways to support the guitar.
My current setup is two pieces of rather stiff foam packing material I ripped out of a flat screen TV box.