Here is a guide on how to add sitemap to your Blogger/Blogspot blog.
1. First go to this Sitemap generator over here: http://ctrlq.org/blogger/
2. Paste your full Blogger/Blogspot homepage URL in the box provided.
3. Click "Generate Sitemap" button below.
4. Copy the generated text and paste it on the Notepad.
5. Logging to your Blogger account.
6. Click "Settings". It will open a new page.
7. Look for "Search preferences" on your left. Click on it.
8. Look for "Custom robots.txt". Click "Edit".
9. Click on "Yes" spot.
10. Paste the generate text from the Notepad inside the blank box provided.
11. Finally click "Save changes".
