I recently held my first TedX speech - The 3 O's you shouldn't be doing. I was invited to hold the speech by my colleague Dario Vlahović, one of the organisers of the TedX University of Zagreb event.
In the last few years, while working at the Institute for Youth Development and Innovativity I learned a lot of valuable lessons, and, in retrospective, learned why some of my past efforts have been unsuccessful. Learning from your own mistakes is great, but it is event better if you can learn from mistakes of others :)
The Three O's You Shouldn't Be Doing: Overthinking, Overcomplicating and Overpromising!