Learn Korean words online. Websites such as LearnKorean.com offer free lessons on basic Korean words and phrases (see Resources for more information). These sites also teach you how to properly pronounce words.
Purchase a beginner's Korean lesson manual. You can learn simple Korean words through a lesson book for beginning Korean speakers. These lesson manuals also teach basic grammar and phrases. To purchase a manual, visit an online or local university bookstore. Popular texts include: "Read & Speak Korean for Beginners" by Sunjeong Shin and "Integrated Korean: Beginning Level 1 Textbook" by Hyo Sang Lee, Carol Schulz, Ho-Min Sohn, and Sung-Ock Sohn.
If you wish to learn simple Korean vocabulary without learning any grammar, purchase an English-Korean dictionary. These dictionaries are especially helpful when you are traveling in a Korean-speaking country and need to communicate basic words and phrases.