I realize there are no "cookie cutter" ways to popping the question, but it needs to be thought out, special, planned, creative, then executed. Don't dare make it an after thought, don't be that guy.
If you are going to propose, here are a few elements that MUST be present:
1) Ask her Father.
2) Have a ring.
3) Get down on one knee.
4) Make it special.
Other than that, skies the limit.