Perhaps there's something about the way you're coming across in interviews you're not even aware of that's causing you not to get hired. Or, perhaps, because you're in your late 40's, you're encountering some age discrimination. It's out there... unfortunately.

Is there a state Job Service office you could go to & possibly get some help? Sometimes these sorts of state employment services offices offer job seeking skills training. One good source of information regarding effective job search techniques is JIST Publications:

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I know how punishing job search can be on one's self-esteem. Please take care...