I've FILDed before, but it was kinda lucky. Today I was having a non-lucid then I woke up, waited couple seconds (I was paying attention on my body's vibration as I drift away). The more I felt my body drifting away, the more my heart rate was increasing.

Probably I couldnt fall asleep becouse I got too alert (because of my heart frequency). How not to pay attention on your body falling asleep? Do you have any tips for me?