DH has just finished job hunting and LinkedIn seems to be the way to go career wise. Actually got contacted by recuritment companies from LinkedIn. Best to keep things very seperate. FB for friends and family and LinkedIn for business. And my personal rule- only post about nice stuff about what I have personally done and no opinions.

That way I don't cause any issues. Not worth it as I have aetheist and ultra Christian friends who are always posting about their beliefs.