I was freaking out, people! Using WordPress version 3.3.1, I thought WP got rid of the Excerpt table. Besides the title, the excerpt is simply one of my favorite SEO tools.
So, I missed this part. Just click on Screen Options at the top right corner when creating a new post and select the fields you want shown on the screen. I’ve enabled them all.
The excerpt field is disabled by default in WordPress 3.1+ if you hadn’t previously used it. I’ve always used it, and having installed a new WordPress on this site, I didn’t know this happened. But phew!