Well, hell hasn't frozen over yet- huge surprise. Don't hold your breath anticipating Dan will ever find this thread.
I do not know the man, just admire his accomplishments from afar. Anyone who thinks there are 'secrets' he can share should just read the article on Golf Channel website.
Secrets:
1) Play every hole of the course you are trying to go low on in a top tourney over and over and over again. Countless times. If Unltd. tourney, play the tourney. if single play, use practice mode.
2) Take copious notes; every bounce, every break, where the str8 putts live, how long or short an approach plays. How the wind is 'weak' or 'strong'. Where the putting dots "lie". Which putts to hit softer, which to ram home. And on and on.
3) After you are prepared, fill your veins with ice water. Meditate or do whatever gets you "in the zone" - Be completely confident that your preparation will pay dividends. MANTRA; I GOT THIS
4) Use your peripheral vision and trust it- do NOT stare at the ding line (or off ding location you wish to hit) EXECUTE
5) When the inevitable happens, a WTF moment, a slight mis-hit, a miscalculation whether VEM or otherwise, do not let it take away from your determination to eke out the best result from the next shot. You can make birdie from anywhere- you have done it countless times. Sometimes you don't. Holeouts are still out there. Remain positive. Sometimes you fall short. That's life. Carry on...
The above assumes you know your club/ball combo(s) cold. Exactly. You know how to calculate wind, putting, all the basics to the highest level are indelibly in your genetic makeup. You have countless combos of spin/%hit/club selection to determine the perfect shot for the conditions. You know when to ding and when to off-ding. You have made the same putt so many times you could do it with your eyes closed because you missed it enough times to figure out what doesn't work.
Then do the above.