Really interesting read here for professional users of Photoshop. Lots of obvious stuff here but also some good reminders and tips of effectively using Photoshop. People who are learning Photoshop would be advised to make a PDF of the referenced webpage and have a look at it once a year. There is lots of acquired knowledge in the Reuters Photoshop Guidelines.
One of the black arts in Photoshop is the use of Unsharp Mask. Before 1990 drum scanner operators would be hired on their ability to *smack* a transparency with the right amount of USM (unsharp mask). Often these settings are a highly guarded secret in prepress shops and colour houses. Reuters recommended USM settings are 300%, .3 pixel radius and a Threshold of 0. This would be on a high resolution image and not web quality. It does indeed give a "drum scan" sharpening quality. I've used a whole variety of different settings over the years and settled on something a bit less grainy than the Reuters look but its worth putting in your toolbox if you do this for a living.