Re: How to Use Salt
You may want to check out the lesson on How to Season With Salt, as we go into quite a bit of detail about salt here. The brining lesson, in topic 5, also goes into quite a bit of detail about salt as well.
Note: Our recipes sometimes calls for salt in 2 places as we list the ingredients in order of when they should be used. For example rather than saying 2 teaspoons of salt and then saying in the method "use half the salt" we would simply just break it up so you use the appropriate amount of salt when it's necessary. Step 1 might use 1 tsp and Step 3 may use 1 tsp. Does that make sense?
As for skipping the salt in a recipe this is entirely up to you and your dietary needs; however, salt does play a very important role in cooking and it is something that I would not want to cook without. Again, you may find it helpful to review the lesson on Seasoning. Cheers!