Return to work you know
Choose one difficulty in familiar work and use records you can legitimately access. Use several occurrences if your purpose is to recover a repeatable method; one episode can support a hypothesis. You can make this learning attempt without changing the live work or obtaining confidential material.
State the result the next person needs. Separate recorded facts from possible explanations and your proposal. Compare a serious alternative, then follow your proposal through a concrete piece of the available material. Change one condition that could defeat it. State what result remains valid, what needs revision and which missing fact or contribution limits your answer. If the current way is already sufficient, explain why you would keep it.
Use a connected account, a calculation or a small table to make your reasoning inspectable. Explain an important choice to a colleague: why this action supplies the next result, what would make it fail, and how the proposed revision responds. Finish with a useful proposal or a specific limitation. Where the subject grounds are disputed, obtain the relevant professional judgement; these exercises cannot supply missing knowledge of your field.
After discussing or rereading your answer, make the correction yourself. Preserve the first attempt so that you can distinguish what you did unaided from what the discussion supplied. Choose the next task around the operation that still needs practice, rather than repeating a whole exercise by default.