Learning from other's mistakes

When going into a new field or hobby, one way to learn quickly is to learn from other's mistakes.

We all say this and mostly believe it. Yet, we do not spend time actively learning what mistakes are being made by others.

The Internet is full of reports on what's hard when doing the new shiny thing we want to do. A sensible thing to do is to find those reports so that we can truly learn from other's mistakes.