When you're just starting your communications or lead nurturing campaigns go slow at first. Send your communications every month or so in the beginning then ramp up frequency 3-6 months later. Don't send infrequent communications which signals a lack of commitment and inconsistency thereby worrying the subscriber. Develop a lead nurturing campaign or various lead nurturing tracks and stick to a set schedule. Contact Lead Liaison for example lead nurturing programs to use as an example.