Go to "Image Size " Setting the desired value
Bicubic (best for smoth gradients)
Bicubic Sharpen (best for reduction)
Bicubic Sharper (best for reduction) adds the effect of little bit of uncontrolled sharpening. I like to use it at times to counteract the Resampling effect of some websites like facebook for example. If you upload the larger image to FB it tends to use its own Resampling to make it fit FB dimentions and in the process they often soften the image so using Bicubic Sharper I can add sharpening I know will be reduced by FB and gave me altogether approximate version of what I want. In some other cases I want to apply sharpening myself in more controlled conditions.
next UnsharpMask Amount=150, Radius=0,2 Th = 0
Wouldn't that be context specific? Every image is different and you did not mention neither the new pixel dimensions nor the final use. But as a general rule final output sharpening should be applied after Resampling, yes.
-ICCProfile = off
And it is very bad image in Photoshop looks great in the browser is awful (very sharp and much ghosting)
Why do you strip away the ICC Profile? Unless you have specific and most likely very questionable reasons to do so I would advise against it.
Preparing And Saving Images For The Web