Rationality/research tip: if you find yourself getting nervous waiting for controls to come in, then consider whether you should have run those controls earlier.

It's easy to, having acquired some promising preliminary results, immediately run the a medium-sized test. If that works, you might excitedly run a big test, then a huge test. You might then go back and run some sanity-check controls. At this point, you've got quite a lot riding on your controls, so the process of waiting for the results to come in is slightly nerve-wracking. This tells you that you should have run your controls after the medium-sized test.