I especially loved the high pass sharpening Too many people do the 'easy' unsharp mask sharpening, but high pass sharpening does a better job and gives you more options I think.
It gives you much more control over the image. My old tutorial (photos and text) uses the old method. I was very happy to update it with video and the new technique!
If you want to see my tutorials, here theye are:
[link]
But they are in spanis hehehe. Feel free to take any idea for your next tutorial.