And if you are salting the water, you are doing it too soon
In life, timing can often be the most important thing. In pasta, it's pretty much the only important thing.
"Adding salt to the water for your pasta is important, but even more important is how much salt you add and when you add it in the boiling process. Keep in mind that the amount of salt depends on how much water you are using, not the amount of pasta you're cooking. Additionally the salt shouldn’t be added to cold water you've yet to put on the stove or when it's reached boiling, but when the water starts to 'quiver.'" -- Valentina Guolo-Migotto, executive chef at Ca' Momi Osteria (Napa, California)