An unfinished task becomes harder to manage when pieces of it live in a message, a notebook, a remembered conversation and an unlabelled file. Choose one place that tells you where the work stands. It need not contain every supporting document.
A reliable entry needs a plain description, a next action and any date with a real consequence. If another person must respond, record the request and its review point. Link to supporting material rather than copying it into several competing versions.
Make capture cheap
Use a tool available when commitments appear. A simple list is sufficient if you can retrieve, review and update it. An elaborate application you avoid opening will not provide that reliability.
In a fictional example, a client requests a revised sample during a call. Capture the request, then clarify the expected changes. Recording revise sample preserves a phrase while losing the commitment if its purpose remains unclear.
Maintain the agreement
Review the list often enough that its dates and requests stay credible. Close completed items, explicitly decline abandoned work and replace stale next actions. Keep background possibilities separate from promises others are relying on.
When you stop working, can you trust the record to tell you what requires attention on returning? If answering requires searching five locations again, simplify the arrangement before adding another tracking feature.