Peter wrote:
After hacking with a small chisel, and probably damaging my good
lindstrom side cutters, and still not getting anything close to what I
would call a technique - I figured I would ask what is a good
technique for removing oval headed nails from floorboards into joints.
I would rather damage the wood as little as possible.

Hammer them straight through the floorboard into joist.
--
Sir Benjamin Middlethwaite