...and the key to Heather's advice is that your enthusiasm must be sincere. If you're only reason for applying is "because you need to get something", perhaps you should rethink your decision to apply for the job to begin with! Employers understand today's economic realities and appreciate an applicant's "need" more than job seekers might realize. But without that enthusiasm, most employers will believe that it's only your need that put your application in front of them. If you can't muster enthusiasm to do the job you're applying for, simply don't apply! Then you won't have to fake anything!