4) Use White Balance Creatively:
White balance is usually about getting your camera to capture colours correctly, so that despite the ambient light perhaps being quite orange (as in the case of most indoor lighting) or vaguely blue-ish (in the shade or on a cloudy day) everything appears to have the correct colour cast and look normal in the photo. You can however deliberately interferer with this colour calibration to make your images appear warmer or colder for dramatic effect. Sunrises and sunsets for example, often look much more pleasing if you set your white balance to 'shade' which tricks the camera into applying a little extra red that would normally be needed to compensate for the slightly blue effect of shade light.
Of course, we're all looking for our own unique shots and don't just want to copy someone else's, but Google Image Search is a great way to fast track you to the right locations and give you some ideas, from where you can then let your own creativity flow. Similarly, I often use Google Maps and Google Earth to scout an area in advance, looking for certain requirements, such as a access to body of water facing a certain direction, wharves, hidden beaches etc which I can then head directly to when I arrive on a reccy trip.
Unless you're doing something creative, use Auto White Balance (AWB) normally. It's honestly a recipe for disaster to try and remember to manually set your camera to the correct white balance every time you take a shot - not only will you forget more often than you'll remember, but the camera knows the difference between types of light that you may not. "I'm sorry, is that tungsten or fluorescent lighting?"
White Balance only affects JPEG files (and RAW previews) but not the actual RAW. If you're shooting RAW, then white balance really doesn't matter - you can select it later in post processing and adjust it to be perfect - but I admit I still find myself setting it to shade to enhance sunrises etc, because let's face it, it's always encouraging to see a nice photo appear on the back of your camera at the time, rather than have to think, "That'll probably look OK after I've fixed it later".