It is said that on Mahashivaratri, for those that do not sleep and stay awake and meditate, at some point, the energy of Shiva touches. Do it if you can, else no need to fret.
Reciting “Om Namah Shivaya” (while looping perhaps the Essence of Mantras) is a great way to attract the energies of Shiva. Shiva is also the Lord of Yoga - so Pranayama, Breath Awareness are also great ways to seek Shiva within oneself.
Listening or chanting the Rudra (a mantra sacred to Shiva, just like Chandi is to the Goddess) is also considered very sacred on Mahashivaratri.
Some mantras to recite/listen:
Shiva’s root mantra:
Mahamrityunjaya to overcome death, diseases and fear of mortality:
Dakshinamurti mantra for knowledge and enlightenment:
