Twitter (www.twitter.com/feliciajoy): By far, I spend most of my social media time on Twitter. I absolutely love Twitter. The people I follow are my digital army of business and social informants. On the social side, depending on who you follow, Twitter is like a global happy hour where people are talking about all kinds of stuff and providing links that help you learn more. On the business side, it's an on-demand library and fortune teller that provides you with information on what happened already, what's happening now and what's likely to happen in the future. I check it from my BlackBerry and am always sure to respond to @ and direct messages (where someone is specifically speaking to me); and I read tweets and linked pages for the 20 or 30 minutes that I allot per session.