The document discusses various methods for expanding one's vocabulary, including: 1. Understanding how words can have multiple meanings depending on context. 2. Common words like "come" and "go" can have many definitions. Vocabulary expands through patterns, word families, reading, word games, and associations. 3. Idioms and phrasal verbs are multi-word expressions with meanings that differ from the individual words. Examples are given. 4. Confusable words like "affect" and "effect" should be clearly understood. Maintaining a vocabulary notebook can help with revision.