What's a good way to Propose?

My girlfriend and I have been dating for over A year now and I want to propose I asked her parents today when we went to see then in MA my mother gave me my grandmothers ring since she is the type of person that rather have an heirloom than something new. I want it to be perfect. She is not afraid to try new things and is adventurous but is also the nicest and kindest person I know any Advice