From what I understand, it's better to sleep for 5-6 hours before trying for that very reason. I've been trying at like 3 or 4 in the morning, but they say you should stay awake until you're not sleepy and I keep falling asleep. I tried one time as I was falling asleep around 11 PM and I almost made it, my body tingled and I began to hear rushing sounds, but it got too freaky and I snapped out of it.