Goodgulf:
Also, adding things that describe the way a person is speaking can really help.
"Sally, I said for you to Come Here Right This Minute!" She said through tight lips.
"Sally, I said for you to Come Here Right This Minute!" She said teasingly.
"Sally, I said for you to Come Here Right This Minute!" She said laughingly.
"Sally, I said for you to Come Here Right This Minute!" She said with mock anger.
"Sally, I said for you to Come Here Right This Minute!" She said crossly.
"Sally, I said for you to Come Here Right This Minute!" She said in an exasperated tone.
While I agree that the capitalisation within the spoken words can be effective, I would point out that the speech tag (the 'she said' part of the sentence should
never be capitalised unless it comes at the beginning of the sentence, or is a proper noun.
She said, "Come here!" Correct.
"Come here!" she said. Correct.
*Come here!" She said. Incorrect.
Rather than use capitals to give the 'clipped' tone, I think I would do this:
"Sally, I said for you to come - here - right - this - minute!" she said crossly.
I do agree, though, that it can be difficult to write realistic conversation, and convey the tone you want the reader to 'hear'.