The bodhitree protocol is how I induced my 3rd (and 4th and 5th) encounters with nibbana.
This is essentially an ultra-compressed and intensified version of the evening routine, spread out over the course of several hours.
hot bath and vocalisations --> dopamine and serotonin (wellbeing) up, cortisol and norepinephrine (stress) down
cold shower or cold plunge --> increase tonic dopamine ~200% for 2-3 hours
vipassana meditation 45-60 minutes and inhabiting of scaffold
writing down any insights or eureka moments
walking to the shop to have an ice cream --> grounding exercise; moderate food intake increases tonic dopamine*
rinse, repeat
The bath will get you into a relaxed and parasympathetic-dominant chemical makeup while the vocalisation seems to prime minima for consolidation. This is only personal inference, but Buddhist monks chant and do walking meditation for a reason.
The cold shower will turbocharge your focus and likely fill your body and mind with the tingles they call pīti in the Buddhist traditions. Sitting meditation after that will calm all of the neurotransmitters down to the point of equanimity.
Allowing yourself to inhabit your scaffold will temporarily switch off your real-world perceptual framework so it can be edited and improved.
Whether a cessation event comes or not is *not up to you*. One important aspect of this is realising that everything you are doing and thinking is merely a confluence of events; things could never have been any other way.
Your life created your mind and your environment creates your consciousness. Once you achieve equanimity and decide to inhabit your scaffold, recognise that you are merely a domino in the eternal chain and *let go* of all control.
Letting go is the final step. You do not control this. You never did.
PS. 'Letting go' is also known as suppressing the DMN (default mode network) which is responsible for self-referential thought and most of your woes.