Apostrophe's with possessive nouns and pronouns.

Every now and then I have a tendency to misplace or fail to place an apostrophe. The following rule helps clarify any doubts of distinguishing between possessive nouns and plural nouns. Possessive nouns and pronouns demonstrate ownership or some similar relationship over something else. Plural nouns indicate more than one person, place or thing. You can view the above rule here: http://www.yourdictionary.com/grammar-rules/Possessive-Nouns.html