TristanH

Have you ever accidentally published a post before it was ready? Yeah. It sucks. This plugin takes care of that.
When you hit the “Publish” button after writing a post, a small dialog box appears asking you if you’re sure you want to publish the post. You can either click OK or CANCEL. And that’s it! Super simple and no more acidentally published posts.
<a href="http://www.bloggingbookshelf.com/wordpress/publish-confirmation-plugin/" title="Click here for screenshots and video" rel="nofollow ugc">Click here for screenshots and video</a>

Publish Confirmation

When you hit the "Publish" button, a small dialog box appears asking you if you're sure you want to publish the post.

mikehealy

If you use the WordPress admin area on a mobile device, or have cats sometimes walk across your keyboard it can be good to have a fail-safe confirmation before permanently deleting posts from the Trashed items. 
This plugin adds simple JS to the admin area to do just that.

Trash Fail Safe

Require confirmation before deleting items from the Trash, or emptying the whole Trash. Protects against accidental clicks.

Publish Confirmation vs Trash Fail Safe