A system configured to determine sleep onset latency for a subject for a sleep session, the system comprising: one or more sensors configured to generate output signals conveying information related to brain activity in the subject during the sleep session; one or more hardware processors operatively coupled with the one or more sensors, the one or more hardware processors configured by machine-readable instructions to: determine one or more sleep stages of the subject based on the output signals, the one or more sleep stages indicating presence of sleep in the subject during the sleep session; determine a sleep onset moment in the subject based on the one or more sleep stages, the sleep onset moment comprising a moment in time indicating a start of sleep in the subject during the sleep session; determine a sleep intention moment for the subject, the sleep intention moment comprising a moment in time indicating an intention of the subject to initiate sleep, the sleep intention moment determined by a combination of: (i) detecting eye blinks in the subject based on the output signals, and determining the sleep intention moment responsive to the detected eye blinks ceasing for a predetermined period of time; and (ii) determining whether brain activity power in a target frequency band has breached a threshold power level based on the output signals, and determining the sleep intention moment responsive to a breach; and determine the sleep onset latency based on the sleep onset moment and the sleep intention moment; wherein the system further comprises one or more sensory stimulators configured to provide sensory stimulation to the subject, the one or more sensory stimulators controlled by the one or more hardware processors based on the output signals and the sleep onset latency to induce and/or enhance sleep in the subject during the sleep session. one or more sensors configured to generate output signals conveying information related to brain activity in the subject during the sleep session; one or more hardware processors operatively coupled with the one or more sensors, the one or more hardware processors configured by machine-readable instructions to: determine one or more sleep stages of the subject based on the output signals, the one or more sleep stages indicating presence of sleep in the subject during the sleep session; determine a sleep onset moment in the subject based on the one or more sleep stages, the sleep onset moment comprising a moment in time indicating a start of sleep in the subject during the sleep session; determine a sleep intention moment for the subject, the sleep intention moment comprising a moment in time indicating an intention of the subject to initiate sleep, the sleep intention moment determined by a combination of: (i) detecting eye blinks in the subject based on the output signals, and determining the sleep intention moment responsive to the detected eye blinks ceasing for a predetermined period of time; and (ii) determining whether brain activity power in a target frequency band has breached a threshold power level based on the output signals, and determining the sleep intention moment responsive to a breach; and determine the sleep onset latency based on the sleep onset moment and the sleep intention moment; determine one or more sleep stages of the subject based on the output signals, the one or more sleep stages indicating presence of sleep in the subject during the sleep session; determine a sleep onset moment in the subject based on the one or more sleep stages, the sleep onset moment comprising a moment in time indicating a start of sleep in the subject during the sleep session; determine a sleep intention moment for the subject, the sleep intention moment comprising a moment in time indicating an intention of the subject to initiate sleep, the sleep intention moment determined by a combination of: (i) detecting eye blinks in the subject based on the output signals, and determining the sleep intention moment responsive to the detected eye blinks ceasing for a predetermined period of time; and (ii) determining whether brain activity power in a target frequency band has breached a threshold power level based on the output signals, and determining the sleep intention moment responsive to a breach; and (i) detecting eye blinks in the subject based on the output signals, and determining the sleep intention moment responsive to the detected eye blinks ceasing for a predetermined period of time; and (ii) determining whether brain activity power in a target frequency band has breached a threshold power level based on the output signals, and determining the sleep intention moment responsive to a breach; and determine the sleep onset latency based on the sleep onset moment and the sleep intention moment; wherein the system further comprises one or more sensory stimulators configured to provide sensory stimulation to the subject, the one or more sensory stimulators controlled by the one or more hardware processors based on the output signals and the sleep onset latency to induce and/or enhance sleep in the subject during the sleep session.