Process talks like these are nice starter topics, because they have a natural story arc (encountering a problem, working through it, achieving results, reexamining initial assumptions), and people tend to be curious about how others do their work.

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Gather more inspiration from the site Lanyrd

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You might also try the newsletter Technically Speaking

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My coworker Ian Malpass practices alone, records his talk on his computer, and then sends it to others to get their thoughts asynchronously

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