"I know I can improve on some technical skills like using Excel and PowerPoint. Currently, I am somewhere between beginner to intermediate level in these programs. Being at a more advanced level would help me develop more effective reports and presentations. I have enrolled myself in an evening/weekend workshop for the next six weeks. I'm looking forward to seeing how stellar my skills are after that course and how I will be able to apply my skills on the job!"

Your response can be school or work-related. Be candid in your answer, recognizing that you aren't great at something and acknowledging your need to improve. However, pick weaknesses that are not core skills for this position, and be sure to discuss your action plan for improvement. Perhaps you are watching TED talks to gain skills in a particular area, reading the latest and greatest book on the subject, or maybe you are taking a seminar at a nearby community center.