This document discusses different types of cohesive devices that can be used to link ideas in writing. It explains that there are two main types of cohesion - grammatical cohesion, which is based on structural content, and lexical cohesion, which is based on lexical content and background knowledge. The document then provides examples of different methods of cohesion, such as anaphoric reference, cataphoric reference, exophoric reference, tense agreement, linkers, and substitution. It concludes by emphasizing the importance of practicing using cohesive devices in writing rather than just studying examples in isolation.