What are the eight comma rules?

The 1st comma rule:

Use commas to separate words

and word groups in a simple series of 3 or more times

The 2nd comma rule:

Use a comma to separate independent clauses when they are joined by the following conjunctions: and, or, for, nor, so, but, and yet.

The 3rd comma rule:

Use a comma to separate a dependent clause from an independent clause.

The 4th comma rule:

Use a comma to separate any word or phrase from the rest of the sentence that is not essential to the rest of the sentence

The 5th comma rule:

Use a comma to separate a quotation from the rest of the sentence.

The 6th comma rule:

Use a comma to separate an introductory element from the rest of the sentence.

The 7th comma rule:

Use a comma to separate the name of a city from a country or state

The 8th comma rule:

Use a comma to separate the day of the week, the day of the month, and the year