When making tomato sauce, don’t let it boil for more than 20 minutes, because then the liquid starts separating from the tomato pulp, which sits at the bottom of the pot and the liquid floats on top. Add a teaspoonful of tomato paste when making tomato sauce for the colour and to reinforce the taste as well.
Two herbs that compliment a good tomato sauce are basil and thyme and if you use fresh herbs so much the better.