What does God do?

Given that the Universe follows scientific laws, what is left for God to do? Does God selectively intervene to perform miracles? Do these miracles violate physical laws or are they just highly improbable? Does God answer prayers? Does God follow a set of rules or guidelines in determining who should be helped? Are these rules beyond our comprehension? If we could know these rules, would we agree that some good people need to suffer and some evil people need to prosper to bring about the greatest good? Does God reward people in the afterlife and, if so, does He not see the irony of people being good only to receive eternal reward?