Good question : One thing I would do would be to turn back the clock to a time before our daughter was born, to have doctors do everything possible to make sure that our baby would not be born with difficulties so that today she could walk.
Another thing I would do is to go back in time before Jesus was crucified, to stop it from having happened.
Another thing I would do would be to go back in time to prevent the destruction of the World Trade Center so no one was killed, and save the lives of people in airplane crashes.
I would stop the attack on Pearl Harbor, and stop the exploding of the Hirosima atom bombs. I would prevent all the wars in History from ever happenening.
I would prevent the black plague, and the assination of President Kennedy, and of his brother Bobby, and Reverend Martin Luther King.
I guess I would spend my entire life saving lives from bad events happening in history. And I would want to have plenty of money so I could travel to do these things.
Without any consequences, then why not.
God Bless You.