Lessons learned from mistakes done by startups and bigger companies. How to learn from data, how to make it useful and actionable.

17. http://www.mindtheproduct.com/2014/03/video-easy-ab-testing-fk-ups/
A/B testing like a pro

20. Where do people feel happy?

22. www.tylervigen.com
Are these two connected?

23. www.tylervigen.com

24. www.tylervigen.com
These two MUST be related!

25. www.tylervigen.com

41. Charts art and science

42. http://www.slideshare.net/idigdata/data-visualization-best-practices-2013
http://www.slideshare.net/VanrajsinhBihola/data-visualization-technique-how-to-
design-charts-and-graphs
http://flowingdata.com
http://www.labnol.org/software/find-right-chart-type-for-your-data/6523/

45. How to lie with charts 101

50. NM.pl & (Percolate)

53. Strava app image

55. Co to jest Kwit