To work non-destructively when working with the Blur, Sharpen or Smudge tool, create a new blank layer, and click on "Sample All Layers" in the options bar. Then make your adjustments in the blank layer.
Free Transform and Puppet Warp can both be applied to a Smart Object making any changes nondestructive! To turn a layer into a Smart Object simply right-click on the layer and select 'Convert to Smart Object' .
JAMIE REID: Sid Vicious – Action Man
The Black Keys / Ken Taylor
Every time Walls of Jericho comes on my iPod I feel like it's 1999 Hell Fest all over. #WhatHappenedToMyYouth?
Stopping Motion With Shutter Speeds Infographic
Photo Dojo's quick tips • Infographic: The Effects of Various Light Modifiers on a Subject