Knowing your partner -- and her expectations about the proposal -- are the key to proposal success, says Krywicki.
In his booklet, "The Seven Biggest Mistakes Men Make When Proposing," Krywicki says the first mistake is timing. Is she ready? Is your relationship ready?
The second is expectation.
"You really need to know what her expectations are," Krywicki says. "Most women, not all of them, but most women have this fantasy of how this special day will take place.
"Now, if you've got a partner that's innately private and you go and do a public proposal and she feels pressured to say yes because everybody's looking at her -- that's not a good thing."
The wrong kind of obligation
If only Kirsten Thomas's ex-fiance had been operating with such expert advice.
He proposed while the couple was on holiday in South Africa, only to break it off 10 days later.
When she asked why he'd proposed in the first place, he told her he'd felt pressured to carry it out while they were on vacation.
Which begs the question: Is planning a "destination proposal" all becoming a bit of an industry, something so expected that it's no longer a surprise, even a bit cliché?
Rachel and Phil's romance had all the hallmarks of a fairy tale. They met in New York while Phil was on a secondment from his London law firm and began dating casually.
Then, one day when they were running a half-marathon together, Phil suffered an aneurism and was rushed to the hospital in a coma. Rachel kept vigil at his bedside and when he woke, they fell in love over a tray of bad hospital food.
Rachel eventually moved to London to be with Phil and expected a proposal would follow.
"I was kind of expecting a destination proposal for a long time," says Rachel. "Every trip we went on -- Paris, New York, Corsica, Sicily -- I was always like, 'Oh, this is romantic' waiting for the proposal that didn't come."
Then they took a trip to Rome and it happened. While the moment was romantic -- let's not forget the bubble she found herself in -- the story they tell these days is more about how that bubble was burst by a street vendor trying to sell them a rose.
"That really brought us back into the commercial aspect of hanging out around the Trevi Fountain in Rome," says Rachel.
Perhaps Katherine Burgdorf got the balance right when she proposed on a park bench during a coffee break from work. The big surprise here is not that she was a woman proposing to her boyfriend, but that it was a warm, sunny day in London.
"It was a beautiful day, so we went and had a coffee at our favorite coffee stand," says Katherine. "We sat on a park bench under a beautiful apple tree.
"I think I was overwhelmed by the weather and I thought, 'Oh my God, I'm going to ask!'
"I totally surprised myself. I had the shakes afterward. And he was like, 'Yes! Yes, yes, yes, yes, yes."'