- BurntSushi's blog post and specifically on using unwrap.
- Context-preserving error handling blog post.
- Error Handling in a Correctness-Critical Rust Project from the author of Sled, a very high quality project to build a key-value store in Rust.
- The Error Model a post on the error model of Midori (a research operating system). Not Rust-related, but a similar error model. Discusses motivation, history, and design issues which are relevant for designing Rust errors.