#1 Clearly communicate why you are here, what you do and how you add value. Cisco's POV is a good example. World would be a better place if we learnt to collaborate. A very good organising principle.
#2 To cut through the search mentality you have to be interesting, whether it be content or free stuff or sponsorship. Like Sage's sponsorship of Krypton factor. There is also a big point here about listening and relevance.
#3 Obvious. And a lot more than just social media by the way.
#4 If customers bother to contact you (and you sell expensive stuff) roll out the carpet.
#5 They expect free stuff. do it. Tools, articles, assessments. Try not to make it too thinly veiled a selling process.
#6 CRM. yes. and don't leave it to sales.
#7 Advocacy, customer forums, co-creation. Dell, BMW telematics design, Amex Open.
#8 The bit everyone struggles with. Involves everything from collateral to managing intermediary relationships.
I am composing a list of case studies if anyone has some suggestions love to hear them.