Perhaps the best thing I can tell you about the techniques in this section is that they should have a warning label attachedWarning: Once you start experimenting with the many possibilities that are available to you, you may experience loss of sleep and find yourself starting every sentence with "I wonder what will happen if I try..."
The beauty of these techniques is that you're never really finished, since you can always come back and try a different setting, tweak an adjustment layer, or apply a different filter or two (or five). Of course, that's also why I think there's a need for the warning label, because you're never really finished. It can be bordering on addictive when you start digging into the unlimited options at your fingertips. Don't say I didn't warn you!