One of the best qualities of working digitally is the flexibility - and no tool showcases this better than the "Puppet Warp". It's a tool I've avoided showing in a video so far because it's relatively new to Photoshop. Additionally, it's very specialized and doesn't transfer well to traditional drawing. But if you need to slightly change the pose of your character, and you've already painted tons of details... there's nothing better than a quick puppet warp.
If you're not familiar with the warp tool that I mention in the video, you might like watching these two videos: Applying decals and thumbnail chop and warp.