add new post-release tasks section to help release managers
diff --git a/docs/doing-a-release.rst b/docs/doing-a-release.rst
index fc88a91..5f96b44 100644
--- a/docs/doing-a-release.rst
+++ b/docs/doing-a-release.rst
@@ -39,3 +39,13 @@
'...'
Verify that this is the version you just released.
+
+Post-release tasks
+------------------
+
+* Update the version number to the next major (e.g. 0.5.dev1) in
+ ``cryptography/__about__.py`` and
+ ``vectors/cryptography_vectors/__about__.py``.
+* Add new changelog entry with next version and note that it is under active
+ development
+* Send a pull request with these items