श्री महालक्ष्मी अष्टकम्
Just eight verses, but they pack a punch. Indra composed this after Mahalakshmi appeared in her warrior form to destroy the demon Kolasura and save the gods. Every verse ends with the same line: "Mahalakshmi Namostu Te" (Salutations to Mahalakshmi). That repetition is the whole point. It builds, verse after verse, describing a different form of her grace each time. People chant it on Fridays, during Lakshmi puja, during Navaratri. It's short enough to memorize and powerful enough that you'll want to.