Honestly, confidence plays a huge part in golf. I am pretty much a one shot type of player and i will shift around the tee box area and angle the shot to fit a lot of holes before i change my shot shape, so that helps me out a lot. But as for putting, confidence plays a huge part. During the 2nd half of last year, you putt down anything inside 5', i would tell you i would make 100 out of 100. I was just confident with it, it was really fun. It wasn't a sudden change in putting style, it was just a belief that i could do that. Really it came from practice and seeing that i could do it, then its basically knowing you can. It pushing all the can'ts and what if's out of your mind and focusing on the positive. That in its self takes practice.
What's helped me a lot has been my progression in the game. Accepting i can't be perfect, accepting that i might miss an occasional putt, but i know i can make the next one. Basically i learned to control my emotions, my thought process, and my putting ability jumped a ton. A lot of it is not caring if i miss a putt. The problem with people is they care to much about the out come. Do you want to make a putt, yes, will the world end, no. So what if you miss a putt, its a game, its golf, go onto the next shot or next round.
I played my favorite course, my short game was on fire all day, i was looking to break 80, on this course, that's really good. On the last hole i stripped a drive, i hit a perfect 7 iron to the green in two on a par 5. I three putted for par. was it a let down, yea, but i still played one hell of a round.