Dialog Tags
Title
Subtitle
Quotation marks wrap around the quote.
Speeches longer than one paragraph are offset correctly with leading quotation marks but only the last paragraph has ending quotation marks.
Dialog followed by "he said" includes a comma not a period and the "he" (or she, it, they) is lower case not capitalized.
Dialog interrupted by the dialog tag includes two commas.
No commas before adverbs that follow "said."
Commas are after "said" when followed by participles (adjectives).
Non-modifying dialog tags are stand-alone sentences.
Proper dialog tagging format is used throughout the story
Only dialog is tagged for clarity of which character is speaking.
Long conversations are not over tagged
Which character is speaking is clear throughout the conversation
Long conversations are not under tagged
Look for patterns outside of the basic "he said" or "she said." 
The synonyms do not pull the reader out of the action of the scene. (Improve by removing where possible, or using the innocuous "he/she/it/they said")
Synonyms are not being used to convey a feeling or emotion.  (Improve with "showing" instead of "telling")
Synonyms for "said" are used sparingly 
Emotion tagging has been changed to "showing" to make the emotion stronger. (Exceptions are in high action scenes)
Emotions stand on their own