MacOS: How to recover lost (deleted) system items in the Finder

There are some very interesting things you can do with the Mac Finder. Unfortunately one thing you can do is mess up the left side of the Finder (the Sidebar). Anyone with a Mac and a small child has had the "What happened to my Finder?" experience, as items on the left side of the Finder, particularly in the "Places" section, are suddenly missing.

How to bookmark a directory in the Mac Finder (Part 2)

A very important warning: When you drag your folder over to the PLACES section of the Finder, make sure your image looks like the image shown above, where the folder is clearly going to be placed between two existing folders. If you drag your folder over to the left side, and you're highlighting another folder in the PLACES section, you're going to end up moving your folder to that other folder. That's a great technique for moving your folder from one place to another, but it's not what I'm trying to describe here.

Creating Mac Finder bookmarks (Part 1)

One of the cool things about the Mac Finder is that you can create shortcuts, or bookmarks, to folders that you visit frequently. This is cool, because instead of clicking around to get to your commonly used directories, you can get to them with just one mouse click. That's as fast I can think to make it.