Don't worry about what you're feeling or about sneezing or swallowing. Just try to fall asleep while trying to find the balance of awareness that allows you fall asleep while being aware of the transition from waking to dreaming.

Don't be afraid to lose consciousness. If you're conscious enough of the transition from waking to dreaming, you can lose consciousness but regain it while the transition occurs. I find this is the way I most commonly find the balance of awareness needed to WILD.