Life Hack

http://www.lifehack.org/communication

Cool

http://coolemailforwards.com/

101 Ways to Improve Communication Skills

http://www.wiziq.com/tutorial/68918-101-Ways-to-Improve-Communication-Skills

impact

http://www.impactcommunicationsinc.com/

Tone

http://www.emotionalcompetency.com/tone.htm
http://www.cio.com/article/2444366/relationship-building-networking/the-tone-of-communication.html
http://www.du.edu/marcomm/brandguidelines/voice.html

Steve Bavister

http://www.stevebavister.com/about/

10 basic etiquettes for effective communication

http://etqtetiquette.com/
http://www.rediff.com/getahead/slide-show/slide-show-1-career-10-basic-etiquettes-for-effective-communication/20110517.htm

7C's

http://edu-article.blogspot.com/2013/01/seven-cs-of-business-communication.html

TSE

http://www.tseconsulting.com/tsetools/

15 Tips For Writing An Excellent Email Subject Line

http://www.businessinsider.in/15-Tips-For-Writing-An-Excellent-Email-Subject-Line/articleshow/32322791.cms