The examples in the package docs have always been great starting points for me. Also, I love the fact that Rust will complain if the examples in your comments

The examples in the package docs have always been great starting points for me. Also, I love the fact that Rust will complain if the examples in your comments don't compile. Such a great feature. As a result, copy-and-pasting examples out of rustdoc pages (nearly) always gives you a working starting point to hack from.