Add cookbooks, examples and patterns

text/0000-roadmap-2017.md

@@ -212,6 +212,14 @@ Here are some strategies we might take to lower the learning curve:
   in the works. The effort is laser-focused on the key areas that trip people up
   today (ownership, modules, strings, errors).
 
+- **Gathering cookbooks, examples, and patterns**. One way to quickly get
+  productive in a language is to work from a large set of examples and
+  known-good patterns that can guide your early work. As a community, we could
+  push crates to include more substantial example code snippets, and organize
+  efforts around design patterns and cookbooks. (See
+  [the commentary on the RFC thread](https://github.com/rust-lang/rfcs/pull/1774#issuecomment-269359228)
+  for much more detail.)
+
 - **Improved errors**. We've already made some
   [big strides](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html)
   here, particularly for ownership-related errors, but there's surely more room