This brief article from Scott Anthony, of Innosight and the author of The Little Black Book Of Innovation: How It Works, How to Do It, looks at consumer needs and innovation opportunities.
Also mentioned in the article is The Innovator’s Solution by Clayton M. Christensen and Michael Raynor. Along with The Innovator’s Dilemma by Christensen and Creative People Must Be Stopped by David A. Owens, these are wonderful books to have read and on your innovation reference shelf.