diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 590b8d7d..3d8e504a 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -41,3 +41,13 @@ Sites et doc cools
 ------------------
 
 [Classy Class-Based Views](http://ccbv.co.uk/projects/Django/1.8/)
+
+Helpers:
+
+`./manage.py makemessages --ignore "env/*" -e py,jinja`
+
+`for f in $(find . -name "*.py" ! -path "*migration*" ! -path "./env/*" ! -path "./doc/*"); do cat ./doc/header.py "$f" > /tmp/temp && mv /tmp/temp "$f"; done`
+
+
+
+