Here is a beautiful prayer, written by Shantideva.
May all beings everywhere plagued by sufferings of body and mind obtain an ocean of happiness and joy by virtue of my merits.
May no living creature suffer, commit evil or ever fall ill. May no one be afraid or belittled with a mind weighed down by depression.
May the blind see forms and the deaf hear sounds, May those with bodies who are worn from toil be restored on finding repose.
May the naked find clothing, the hungry find food. May the thirsty find water and delicious drinks.
May the poor find wealth, those weak with sorrow find joy: May the forlorn find hope, constant happiness and prosperity.
May there be timely rains and bountiful harvests. May all medicines be effective and wholesome prayers bear fruit.
May all who are sick and ill be freed from there ailments. Whatever diseases there are in the world, may they never occur again.
May the frightened cease to be afraid and the bound, freed. May the powerless find power and may people think of benefiting each other.
For as long as space remains, for as long as sentient beings remain. Until then, may I too remain to dispel the miseries of the world.