Our hardwood floors are really old (might even be 1963 original?), and several individual nails (~4) have started to work themselves up past the surface. This tends to be in high-traffic areas where I suspect each individual step serves to work it up another notch.

For the last year, I've simply kept a hammer nearby the main spot where this happened. Every couple days, I'd just bang them back down - problem solved! Lately, however, more and more spots are starting to do this - all over the downstairs. It's putting holes in the bottom of all our socks!

Anybody have any advice for gluing these back down for good, or another approach?