1. Run headless unless developing or debugging a script.
2. Do not overstress your testing resources.
3. Monitor the health of the servers on a regular basis.
4. Run pilots - run a test using one engine only to verify that all systems are go.
5. Run the full test at least one time before running a live test - be advised that tweaking the test configuration is a regular occurrence and you may have to adjust the test and setting several times before it's ready to run live.