How do I stop the squeak?

I have found that since I own my home, there is no end to the honeydew list.—(Honeydew this, Honeydew that). My latest honeydew project is my daughter’s bedroom. We’ve repainted, and taken up the 1978-vintage carpet. Before I put the new floor down, there are a few places where the sub-floor is squeaking against the joists. It seems more noticeable now that the carpet is up. Is there a way to fix that without completely pulling up the sub-floor?