I often get asked "what's the next big thing in digital marketing"? Scores of articles and blog posts continue to be written about this; conference seminars have titles promising an answer to this milllion- (ahem, these days make that billion) dollar question; social media "rock stars" sell their clients on the idea that they can predict it. Chances are, they can't. If they could, they'd invest in that big thing, make a wad of cash from the IPO and retire.
Socrates had it right: "“The only true wisdom is in knowing you know nothing.” The key is to listen, learn, be involved, be curious. Take the Socratic approach that "wisdom begins in wonder". You can't possibly read or even find every blog post, article, Twitter feed and Facebook post about digital marketing, nor should you*. But you should let your curiousity guide you to continue learning about your field.
The real value you can bring to your clients is not about saying "I was the first to discover x big thing", but in being able to help them integrate that thing into their marketing mix in a way that makes sense for their customers and supports their business objectives.
*Hat tip to my friend Joel Shapira for the link.