Removing Nails/Screws from Wood
I have had very good success with this method - take a roll pin and drive it over the top of the nail or screw. Grab the roll pin with a pair of locking pliers and wiggle it back and forth a couple of times. It will usually un-screw with the broken nail or screw stuck in the roll pin. You can buy roll pins in various sizes from lowe's or home depot. They are cheap. They are usually located in the hardware section in the pull out drawers. One note of warning – watch the bottom side of the lumber as you drive the roll pin over the screw/nail. You can cause a blow-out that is hard to fix.
Removing Nails in Antique Heart Pine
We have pulled nails out of millions of BF of Heart Pine. The best tool is a heavy duty chisel 1/4" thick 1 1/4" wide and 8" long. Dig down as far as needed. Then take 8" end nippers to pull the nail out. We have tried the tools found in Lee Valley and other places, they usually break in a week or so. I'll post pics tommorow of the crew in action