I sure wish I had found Android LogCat sooner. Even one day without it was too many. I spent three. Since becoming aware of it my Android development experience has been so much better.
Those first days working on Android were fun and exciting but left me confused by the complete lack of feedback when an application crashed. I was debugging my crashes down to the line they were dying on and still not getting any useful information.
Then I found out how to use LogCat. But not before I got burned a few times by subtle but critical mistakes.
To get the LogCat view simply go to the menu bar and select Window> Show View> Other. You will be presented with the following window, just select LogCat.
LogCat will now be added to your list of views in your current perspective. When the LogCat tab or window is active you are then presented with several more icons that allow you to filter on the log message level and create additional filters.
Now all stack traces and other logging messages will be dumped to LogCat when a debug enabled Android device (virtual or physical) is attached.
You can add additional debug or logging messages of your own by using android.util.Log.