Articles I have read regarding portion control recommend a serving of protein (beef, chicken, pork) should not be larger than the palm of your hand.
(Yeah, that's a pretty small chunk of meat.)
Doctors always tell you to cut back on the salt, but unless you have blood pressure issues, adding salt to your food may not be a big deal.
Sodium will cause you to retain water, but if you are drinking plenty of water, the sodium will flush out of your system. Funny that drinking more water will keep you from retaining it.
In any case, processed foods usually contain way more sodium in them than most people would ever think about adding with a salt shaker,