The exclamation points: How do you use this punctuation correctly?
I have found four online sources about the usage of exclamation points, plus check the Chicago Manual of Style 16th Edition for more information. Review and edit your manuscript accordingly.

http://www.ehow.com/how_5952_exclamation-point.html

http://www.nationalpunctuationday.com/exclamationpoint.html

http://www.grammarbook.com/punctuation/exclaim.asp

http://www.cliffsnotes.com/study_guide/Problems-with-Exclamation-Points.topicArticleId-29011,articleId-28984.html