Cartographer in past AddOn Spotlights. In fact, it was even named one of the essential must-have addons that will work even for a beginner.
Now, The Khorium Toolbox has written up an in-depth, step-by-step guide to Cartographer Routes, an addon that let's you track your gathering nodes and map out a farming route that's comprehensive and efficient. While this addon was featured in a recent Insider Trader column, I believe the guide deserves its own spotlight.
As the author of AddOn Spotlight: For the Timid, I was skeptical once I saw the screenshots provided. It looked complicated, and impossible to set up. Fortunately, this guide will walk you through what to download, where to get it, and how to install it.
The guide also helps you configure the addon so that in the end, you will have a map complete with farming route to optimize your farming time. It also walks you through the mechanics of gas cloud tracking and harvesting.
This is a great guide, not only for engineers, but for any gathering profession. Even if you are weary of complicated addons that take time and know-how to set up, this guide will walk you straight through it.
What addons have you been using for your gathering and farming exploits?