The best way to worship Lord Shiv and Maa Parvati would be to rise early in the morning and take bath. The next thing should be to visit a Shiva temple and offer puja The first thing is to offer kachha jal (slow and steady stream of water) to Shivling for shivratri puja. This should be followed by offering a mix of jal and milk offering to Shivling. The next thing to be offered is dahi followed by ghee. After ghee you can offer honey followed by jal again. Items like bhasam and sugarcane juice are also offered. It would be wise to offer Bhel leaves, scented flowers and marking tripund with sandal paste to the Shivling. The three stripes of the tripund represent spiritual knowledge, purity and penance. Such worship bestows disease free life, wards off the fear of untimely death, happy married life and stability in thoughts & actions.