Back in October of 2011, I wrote about how I use SketchUp's extremely useful "Follow Me" tool. Essentially, I told you to select the face to extrude with the tool, and then drag it along the path you wanted it to follow. No sooner had that post gone live than Google put up a post with how to properly use the Follow Me tool. I'm talking 2 days! It's like the SketchUp guys were all laughing amongst themselves, saying "Let's let that Useful Spaces post sit up a little longer, and then let the world know how wrong he is!"
So, with my ego still in tact, here is the correct way to use the Follow Me tool, courtesy of the SketchUp blog.
1) Make sure your extrusion profile (a face) and your extrusion path (one or more edges) are set up the way you want them to be.
2) Select (with the Select Tool) the edges that make up the extrusion path you want to use.
4) Click (with the Follow Me Tool) the face you want to extrude.
Now, in my defense, I still think my way looks much cooler, but if you're doing a lengthy extrusion this is most definitely the way to go.
All pictures from Google