The 28 year old arrives at Trump National Doral after a meteoric rise up the World Golf Ranking, helped by three European Tour wins in the last 15 months.
Willett was 104th in the rankings in November 2014 but is now up to 15th, and showed his winning determination when he sank a brilliant clutch putt on the 72nd hole to claim the Omega Dubai Desert Classic last month.
"There's only one place that everyone up there wants to be and that's everyone's goal," he said.
"If they're not, then more fool them. That's what you work hard for; I don't work hard to try and finish average. You work hard to try and win.
"I think you've just got to try and not put too much pressure on yourself, because it is a World Golf Championships and just go out there and try and have a bit of fun and play golf.
Willett's form has put him at the forefront of the chase for a place on the European Ryder Cup team and should he make Darren Clarke's squad, it will be his debut in the showpiece event.
"You're going to be a rookie at some point playing in a Ryder Cup," he said. "Probably better to be a rookie having won a few times and performed well under pressure in big events.
"I've never played it, so I can't really say, but from what I've heard it's the most nerve-wracking thing you can do. You will definitely still feel like a rookie."
Before Hazeltine comes the Masters Tournament at Augusta but with Willett's wife Nicole due to give birth during the event, the Sheffield native admits his participation is in doubt.
"If she's not given birth, I'll not go. It's too far to get back. You can't get back in time. There's plenty more Masters."