This was from an article about how to propose (that was written by a diamond company).
Guys like Josh make proposals difficult for other guys, and chances are, you may not be able to think of something as romantic and clever as Josh did. So here’s some valuable advice. Choose the classic approach that time has shown again and again to be equally effective. Surprise her with the brilliance of a high-quality diamond to ensure an affirmative answer.In other words, your best bet to get a woman to accept your proposal is the two-pronged approach - show her you've got money and you're willing to spend it on her, and get her when she's off her guard.