Walking the whole jump through on the ground beforehand — exit, formation, break-off — with real sightlines and real grips. Jumps get planned on the ground, not invented in the air.
The reason a dirt dive pays off so well is an uncomfortable one: under high arousal, attention and working memory narrow. Anything that isn't automatic in the air is effectively unavailable during a jump's short working time — up there you can only reproduce what was already solid on the ground. The classic mistake is walking only the fun part: formations yes, exit and break-off 'we'll sort that out'. Yet those are exactly the parts that have to run automatically — neither leaves you any thinking time in the air. Two limits worth naming: a dirt dive rehearses sequence, not flying skill — it replaces neither tunnel time nor coaching. And done half-heartedly it backfires: nodding along instead of walking it means you listened, you didn't rehearse.