In recent years, using A/B testing to drive more actions from email campaigns has become a common best practice amongst digital campaigners. But most people haven’t yet cracked the nut on how to use A/B testing to increase a campaign’s virality and reach a wider audience beyond their existing email list. In this interview, Jim Pugh of ShareProgress talks about using testing to increase virality – the topic of his upcoming Netroots Nation training with Angelica Morales.