Most predictions in daily life don't include making prediction about sports or about which politician get's elected. Most meaningful predictions that I make in my daily life aren't of the type you would find on intrade.
How often do you make a decision in your daily life where it matters which sport team wins? In my life that doesn't happen. Most of my personal decisions are also not depended on which politician's win an election.
To get educated you sent students into university where they try to learn the knowledge in textbooks, Students who seek to study sport focus on studying sport statistics. Students who study politics don't focus on studying which politician won which elections.
Most of the knowledge that people can aquire is outside of the category of predictions you find on Intrade.
If people want to learn how the world works reading textbooks is better than reading the news. On the same token it makes sense to calibrate on textbook knowledge.
Calibrating on actual personal events is also good. That means that you get better at predicting other personal events.
It seems to me this could be a smartphone app. Whenever a person wants to make a prediction about a personal event, they click on the app and speak, with a pause between the thing and how likely you think it is. The app could just store verbatim text, separating question/answer, and timestamping recordings in case you want to update your prediction later. If you learn to specify when you think the outcome will occur, it can make a sound to remind you to check off whether it happened; otherwise it could remind you periodically, like at the end of every day. Why couldn't it have data analysis tools to let you visualize calibration, or find useful patterns and alert you? Seems a plausible app to me.
I'd like to become better calibrated via PredictionBook and other tools, but coming up with well-specified predictions can be very time-consuming. It's handy to be provided with a stock of specific claims to make predictions (or post-dictions) about, as with CFAR's Credence Game.
Therefore, I asked Jake Miller and Gwern put together a list of prediction sources. Feel free to suggest others!
Prediction Sites