It worked, as Day ground out victory by one shot from American Kevin Chappell in Orlando, Florida.
Day's eighth PGA Tour title lifted him one place above Rory McIlroy in the world rankings to No. 2 behind Jordan Spieth.
And it reconfirmed his status as one of the favorites for the U.S. Masters at Augusta next month despite a lackluster start to the season.
"We were trading texts back and forth all week, obviously words of wisdom because he's played well here," Day told his victory news conference.
"It's the same thing. Just be yourself and stay in your world.
"But to be able to hear what he has to say and his advice and how much he believes in me really means a lot, especially coming from the best.
"It gives me so much confidence that a person like that would believe in me, especially as a kid I was idolizing him ever since watching him in '97 win the Masters for the first time and all of a sudden I'm playing the Tour and I'm pretty close with him now."