Silence

I think WBTB is a must. If you really want your WILD or MILD to work reliably, you should include WBTB with it. You don't have to stay up for hours. Sometimes only a couple minutes is enough. Never underestimate the WBTB/ MILD combo.

I've had success with B6. I find it keeps me more alert when I take it during a WBTB. This can be a good thing or a bad thing. When I am super tired and worried I will fall back to sleep too quickly, it helps me stay alert. When I am already pretty alert, it can keep me from being able to fall back to sleep.