Sokka was always like "I'm starving!" And "Where's the MEAT??" and "Yay! Free food! Grab as much as you can, guys!" But...
They never starved, you know? Sokka went hunting or fishing whenever they stopped long enough-- and even if the catch wasn't as much as he wanted to, I don't recall them ever going hungry.
When they were low on money and supplies, Sokka got a job on a fishing boat (Storm Episode). Or asked for food and money, as thanks for saving the village (Hei Bei Forest/spirit-kidnapping episode). Or something similar, the make sure that even if supplies were low, the pot was never entirely empty.
That's a skill.
Contrast that with Zuko and Iroh. Their first attempt at fishing caught barely a mouthful. They went hungry often-- even AFTER they began to resort to begging and stealing. They couldn't forage because they didn't know how to tell the edible from the poisonous.
It's easy to view Sokka as just the funny guy: he cultivated that part of his image, even. It's EASY to say that elite fighters with Royal tutors and private schools, etc, are better educated or more skilled than some teen from the Southern Water Tribe.
But when push came to shove? When it came to personally ensuring that nobody goes hungry while they're on this epic cross-country quest?
Sokka had them beat.
