diff --git a/README.md b/README.md
index 92e81a3..5e924c9 100644
--- a/README.md
+++ b/README.md
@@ -17,5 +17,11 @@
 
 * GitHub Documentation Tutorial: https://guides.github.com/features/wikis/
 
+* Differences between various `git add ` flags: https://stackoverflow.com/questions/572549/difference-between-git-add-a-and-git-add
 
+* More on .gitignore: 
+  * https://guide.freecodecamp.org/git/gitignore/
+  * https://git-scm.com/docs/gitignore
+
+* .gitignore templates for various programming languages and operating systems: https://github.com/github/gitignore