If you're cutting (trimming body fat), I'd say 0 - 5g of sugar a day. But if you're doing a ketogenic diet, then you have carb-up days where the sugar has no limit.
But the general rule of thumb is, the less sugar the better.
When you're bulking, it's not restricted but in this case, I'd say the only time u want sugar is After a workout when your muscles rapidly absorb it. At other times, the probability of sugar to fat conversion can be high.
Hard2Gain already explained salt... sodium.
Saturated fats should be consumed conservatively. From your total fat consumption, let's say only 20% max should come from saturated fats.