Fellow speaker,
According to professional speaker Patricia Fripp, instead of asking your audience a general question, use the word "often" in your question. This will get people thinking of the situation as something that lasts awhile (i.e., not a "one off" situation). For example, "How often have you wanted to improve your life and overcome your life challenges?"
Oftenly,
Tim Wilson
Professional Speech Coach
Free speaking tips at: http://speakingquicktips.blogspot.com