Kellie Celia provides tips for authors to build a community and promote their work through low-cost marketing initiatives. She recommends connecting with core audiences like other writers, teachers, and bloggers. Authors should build buzz by seeding their book to influential people and considering early promotions. For book launches, authors can harness social media, blogs, and local press through ideas like Twitter promotions and blog tours. Kellie provides recommendations for free tools to help with social media, blogs, and online publicity.