When she's travelling (the ultimate test of a packable lunch), Bonnie Taub-Dix, RDN, creator of BetterThanDieting.com and author of Read It Before You Eat It: Taking You From Label To Table, said she munches on a crunchy almond butter sandwich on whole grain bread. "It provides protein, fibre, and healthy fat to help keep me feeling full and satisfied, and it's decadently delicious," she said. She'll also pack a fruit, like an apple, pear, or banana, and a DIY trail mix with mixed unsalted nuts, dried fruit, and cold cereal.