Self-catering is the first lesson in Stephanie Tsoflias' Mediabistro video about the "Top Five Things I Didn't Learn in J-School."
"You're going to be the only person over 30 to pack a brown-bag lunch," she says. "That's because it's the only balanced meal you'll get that day, and plus you don't want to spend every penny you're making."
More advice from Tsoflias: Always pack long underwear, unless you're working in Florida or somewhere else that's usually warm. "Wear them, own them, stock up on them, and don't be embarrassed."