A stitch in time saves nine.

Actually twelve, in some specific cases as in Yours truly.

Had I the good sense to get rid of that awful corn on my right foot a month or two back, I might not actually be killing my time and yours with useless posts.

One stitch on my right foot may have actually, virtually, practically, effectively and so on and so forth, saved me from acquiring 11 more stitches on both my feet.

By the way, ‘corn’ makes for a lot of corny puns, most of them only if intended, but I shall desist and save you some more aches and groans.