A writing voice is easier to recognize when examples share a purpose. Choose a few pieces that show how you normally explain, structure, and qualify an idea.
Choose samples with signal
Use writing you own or are authorized to process. Prefer examples that are complete enough to show an opening, a middle, and an ending. A mix of recent work and a stable example can help you decide which patterns you want to keep.
Give the brief its own job
Tell Writees what the new piece needs to accomplish, who will read it, and which facts or constraints matter. Samples describe your voice; the brief describes this piece.
Example brief
“Write a concise project update for a familiar colleague. Keep the next step clear and mention the Friday deadline.”
Compare before you commit
Three alternatives make a useful review set. Look for a direction that preserves your meaning, then revise the parts that need more precision or warmth.