- A good ratio of salt/water is one tablespoon per litre (or gallon). Reduce if the sauce is going to be very salty already (eg carbonara). We're talking kosher salt here (specifically Diamon Crystal), if using table salt it's probably going to be half of that: salt density varies a lot depending on the type.
- Cook your pasta is _as little_ water as possible. For some reason there's some myth that you want to cook pasta in a large volume of water: that's BS. What makes pasta water "liquid gold" is the starch that comes from the pasta, you want that as concentrated as possible.