The greatest way to help is to pray daily (hourly, half-hourly, etc.) for Lily and encourage others to pray also! Prayer brings about miracles and the more people praying, the greater the chance of a miracle happening. And Lily truly needs a miracle. She has suffered severe brain damage due to lack of oxygen at birth. We have been praying for the intercession of Sts. Lillian of Cordoba, Faustina, and the Blessed Mother under the title of Our Lady of Loreto (the feast day upon which she was supposed to be born), whom she is named after (Lillian Faustina Maria). However, if you have a favorite saint to implore intercession from, by all means pray to them. The more intercessors the better!
Thank you and God Bless you!