Exclude the current node from a list view / Excluir un nodo de una vista en drupal

1. Click on the "advanced" tab.
2. Click on add under "contextual filters".
3. Choose Content:nid.
4. Under "when the filter variable is not available, choose "provide default value".
5. From the drop down menu select "content id from url".
6. Scroll all the way down to the bottom of the window and click on the "More" link.
7. Click "Exclude"

Referencia: https://www.drupal.org/node/131547