Some excellent advice on growing your social presence -
http://www.associateprograms.com/articles/963/1/The-Affiliate-Marketers-Social-Media-Profit-System/

Good info about targetting the elderly - http://searchengineland.com/survey-older-americans-flocking-to-social-media-49466

Measuring your social media success (or the lack of it) - http://searchengineland.com/the-perfect-social-media-measurement-plan-48999

Enjoy your day!