Marketers have a seemingly endless number of ways to engage with audiences online. But the most common methods are straightforward emails and email newsletters, according to research by Chief Marketer. Video is also quickly emerging as a valuable tool to engage with users. Marketers seem to have an ever-growing number of ways to drive customer engagement on brand websites. In a March 2012 online survey of US marketing professionals, trade publication Chief Marketer found that the most popular tool in digital campaigns was tried-and-true email marketing, which 78% of respondents said they used. Email newsletters were the No. 2 tactic (59%), followed closely by a social network presence (58%). This year, for the first time, Chief Marketer asked respondents if they hosted original video content on their sites or on aggregator sites like YouTube; one-third of respondents said they did.