Think of one of your weaknesses.
Maybe it's that you're messy.
Maybe you're impulsive.
Maybe you're a worrier.
Now think hard about that weakness — would you say that there's maybe a silver lining to it?
Sure, you're impulsive. But you know in your bones that it means you're more creative than the average schmo.
Maybe you're messy and you can't find your things. But it also means you're laid-back and know how to go with the flow.
Or you worry a lot. But aren't you always prepared for anything?