I know I put it somewhere...
According to a recent study from the University of Washington, people are much more likely to misfile and lose track of paper information than information stored on a computer:
More than half of survey participants admitted losing track of a paper document at least once a week -- more than twice the number of people who reported losing electronic information. The result? While more than 60 percent reported being satisfied with their ability to handle computerized records such as e-mails, electronic documents and Web bookmarks, only 31 percent were satisfied with their ability to organize their papers.