diff --git a/TODO.md b/TODO.md
index 50222997..cf41b772 100644
--- a/TODO.md
+++ b/TODO.md
@@ -5,3 +5,9 @@ it will save a lot of time. Sample usage:
 ```
 # bash convert.sh 4-howto/abc.md 9-troubleshooting/def.md
 ```
+
+Split main code to several small functions:
+
+    1. Find all articles, or get articles from command line.
+    1. Convert file names, etc.
+    1. Execute tools/markdown2html.py to convert files.