If you are getting interviews but not job offers, it's time to review what's going on. The problem is not in your resume; it's in the interview. You are not connecting with the interviewer at some level. It's not always your fault, but at times you have to look at your contribution to the process. When I hear of individuals getting discouraged because they are not landing a job after lengthy searches and multiple interviews, that's a red for me. While one might think it easy to just switch from depressed job searcher to enthusiastic job hunter, the odds are not good. Remember that body language and tone of voice account for 93% of the interview process. Keep your attitude in check.
If you're finding yourself discouraged, make sure you engage in activities that will lift you up. For starters, read inspirational books, exercise regularly, and help others. Above all else, don't give in to despair! You have a calling to fulfill.