This is mainly done old-school with cell-phone numbers. And has always a strict reason like supporting an application.
Private
Nowadays it's just twitter, jabber and facebook. The first one is used for the internet-savvy communities but not too technical. The second one is for the most technical community, mostly they don't have a twitter-account here in Germany. The last one is mainly for real friends I stay connected with.
Business
This is mainly done old-school with cell-phone numbers. And has always a strict reason like supporting an application.
Private
Nowadays it's just twitter, jabber and facebook. The first one is used for the internet-savvy communities but not too technical. The second one is for the most technical community, mostly they don't have a twitter-account here in Germany. The last one is mainly for real friends I stay connected with.