Twitter marketing in 4 words: Listen. Learn. Care. Serve.
Focus on the core problem your business solves & put out lots of content & enthusiasm, & ideas about how to solve that problem.
Helpful is the new viral.
Effective results come from knowing what's in it for them. What's your community there for and how you can nurture it?
You earn influence by giving value and attention to other people. BE USEFUL!
Ask what you can do for influencers, not what influencers can do for you - develop relationships!