[Question] When does introspection avoid the pitfalls of rumination?

A theme I see being explored in the LW-sphere is the importance of connecting to system 1 information in various ways.

There’s lots of stuff about meditation, Focusing, connecting to sub-agents, the question “What would happen if [...] you introspected instead?”.

On the other hand, it appears to be received wisdom that a collection of behaviours called rumination are maladaptive. But “focused attention on the symptoms of one’s distress, and on its possible causes and consequences, as opposed to its solutions” doesn’t sound a million miles from some of the techniques in the paragraph above.

What gives? Are some of the techniques bad? Is rumination OK? Are they importantly different, and if so, how?