This is a followup to the previous post.
So you've got something to say, the job now is to say it. How shall you photograph whatever it is to convey whatever it is you want to convey?
At this point you should have familiarity with a large vocabulary of photographic methods. Shallow/deep depth of field. Low camera angle. High camera angle. Wide field of view, narrow. High contrast, low saturation, black and white, high saturation, vignetting, and on and on. The dictionary of "words" in the photographer's vocabulary is large.
But how do we put them together to say something? These things might still just be meaningless noises to you. If you know all the word of Swahili, but not what any of them mean, you still can't say anything in Swahili, can you?
Things are made worse by the fact that each of these photographic "words" has no fixed meaning. It's all very well to say that a low camera angle conveys a sense of, hell, I don't even know. Something. But it's not true. Still, with a deep vocabulary, and a lot of experience in how those "words" have been fit together by other photographers, you can begin to make your own sentences. You gain this experience by looking at a lot of pictures.
In every case of a successful photograph, some specific combination of things has been brought together to convey a coherent something. A "sentence" in the language of photographs. If the photograph succeeds (for you) then you should be able to more or less immediately understand what it's conveying. By looking at the specifics of the picture, you can see what "words" are being used. Sometimes you can see, quite specifically, how the pattern of "words" fits together to produce the meaning. Other times, you cannot, but you still feel the gestalt effect of the "words" in the result. Either way, study the picture. Absorb.
Look at the photographs in magazines, get hold of some photo books, look in the FSA archive.
Look at photographs.
Think about what you're trying to say.
Use the techniques for generating inspiration. See, for instance, this post.
If you're lucky, you'll find a way to use the vocabulary of photographic idioms you possess, to express what it is you want to say.
Now shoot a bunch more like it, build a portfolio around these ideas. Take a bunch of pictures conveying similar ideas with similar vocabulary, or perhaps sometimes an opposing idea with opposite vocabulary. Or whatever. Now you're cookin' with gas.