Hmm. Personal favorites on systematic ways to see the forest would be Michael Porter's Competitive Strategy...and from a career perspective, Stephen Cope's The Great Work of Your Life. There's also a book, Seeing the Big Picture, on Amazon that purports to solve exactly this problem...I've not read it, but it's got good reviews: http://www.amazon.com/Seeing-Big-Picture-Business-Credibility/dp/1608322467/ref=sr_1_1?s=books&ie=UTF8&qid=1378220522&sr=1-1&keywords=see+the+big+picture
I'd also be curious about to what extent this is a skills issue, vs. one of orientation (what you like to do) and/or one tied to some form of blocks. The books will be useful if it's mostly about skills. To the extent you don't look at the forest because it's hard to let go of the trees, you'll probably need someone outside yourself to help you. Is there anyone else in the company who's good at big picture who you trust with your vulnerability in this area?