While I am not a professional by any means, I have been writing for many years and, more recently, beta-reading as well. In all of my experience, I've noticed that a lot of to-be authors make some really silly, simple mistakes. In an effort to help out, I'm going to be putting up a few "Quick Tips" that might help you improve your writing and get more readers.
For this "Quick Tips" entry, I'm going to focus on conversation and the use of quotations. Here we go Punctuation in Quotations
When a character is speaking, their statement is often followed by, "she said" or, "he mumbled". However, you have to keep in mind that this is still part of the sentence!
Incorrect: "Wait, I have to tie my shoe." she said.
Correct: "Wait, I have to tie my shoe," she said.
Even though her statement ended, the sentence carried on to tell the reader that it was she who spoke. That's how it works with a period, but with exclamation marks and question marks, many people choose to ignore t