diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index a27f535..69a6b7a 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -8,7 +8,13 @@ When making a pull request, please follow these guidelines:
 - Lists within each section are alphabetized
 - Add sections if necessary
 - Clear, concise descriptions for each link, followed by a period
+- No duplication of tools, put them where they make the most sense
+- Wrap lines at ~80 chars, no trailing whitespace or unnecessary newlines
 - By submitting a pull request, you agree to release your submission under
   the [LICENSE](LICENSE)
 
+The rules above take precedence, but in case I missed something, check [the
+awesome guidelines](https://github.com/sindresorhus/awesome/blob/master/contributing.md)
+too.
+
 Thanks!