diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000000000000000000000000000000000000..bea575523049584375fc6633238255015d3a4c84
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+TAGS
diff --git a/README.md b/README.md
index 7964f54b587c451ee348fdc375ac3ef04c47fbaa..26d5a852ee8306ec8bcf62791a81f3eae718589f 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,6 @@
 # crep - like grep but for code
 
-todo...
+> Note: you should use ctags or etags. Seriously. This is an experimental thingy.
+
+- https://en.wikipedia.org/wiki/Ctags
+- https://www.emacswiki.org/emacs/TagsFile