What things have hidden sugar? Pretty much everything!!! Almost anything commercially produced will have sugar in it - tomato sauce, pasta sauce, everything. Reading the labels is the only way you will find out and cooking from the scratch is the only way to avoid it!

As far as the salt consumption - great to keep up a good intake of salt as it has important health benefits - I'd go for a pink himalayan one which is supposed to have more health benefits than regular salt. Don't be afraid to add good natural fats to your diet also for healing properties (butter, coconut oil, animal fats).