Lead nurturing marketing 

The Definitive Guide to Lead Nurturing offers useful, qualitative insight from today’s marketing thought leaders, basic and advanced B2B marketing best practices on must-have campaigns, and worksheets for calculating ROI and measuring the impact of nurturing done well.
http://www.reddit.com/r/marketing/comments/2g2sho/hubspot_marketo_etc_for_lead_nurturing_with_b2b