When you are ready to conduct your testing, you should begin by briefing your test participants. Explain the purpose and process of the testing, get their consent, and answer any questions they might have. Additionally, provide them with instructions or incentives for completing the testing. Afterwards, observe and record how your test participants interact with your layout design, either directly or through a tool. Additionally, record their actions, reactions, and feedback, either verbally or through a tool. Avoid interfering with their natural behavior or influencing their opinions. Finally, debrief your test participants by thanking them for their participation, asking them for any additional comments or suggestions, and providing rewards or follow-ups. Furthermore, ask them to fill out any surveys or questionnaires that you have prepared.