More documentation
diff --git a/doc/usage.rst b/doc/usage.rst
index 2c01cec..bd499a9 100644
--- a/doc/usage.rst
+++ b/doc/usage.rst
@@ -1,11 +1,31 @@
Usage
==================================================
+This section describes the usage of the Python-RSA module.
-.. toctree::
- keygen
- simple_enc_dec
- sign_verify
- big_files
+Generating keys
+--------------------------------------------------
+
+Before you can use RSA you need keys. You will receive a private key
+and a public key.
+
+.. note::
+
+ The private key is called *private* for a reason. Never share this
+ key with anyone.
+
+
+Encryption and decryption
+--------------------------------------------------
+
+
+Signing and verification
+--------------------------------------------------
+
+
+Working with big files
+--------------------------------------------------
+
+