Everything here is pretty focused on more power but if you're hitting the basket there's 2 variables in that, power and the arc of the shot. Obviously if you aim higher, it goes higher, but I raise this point because I think early on when you watch videos of top pros putting it can be misleading to make you think that your putts need to be very flat horizontally and you aim straight into the chains from outside the circle. Really it's about finding the right arc at 20+ feet and the arc increases almost exponentially as you go further out.
So for example, at 20ft I aim straight into the chains, 30 feet I'm going at the top of the basket (chastity belt) and using enough power such that the disc apex is right in front of the basket, falling for the last few feet. 40 feet, maybe a foot above with an apex 2/3rds of the way, 60 foot jump putts I'm going about 5 feet higher than the basket, and I'm aiming more for falling in the basket now, than the chains.
I always figured that I and the best players I knew locally just didn't have the power in our putts and/or the glide in our putters like the top pros, but a couple months ago I finally got to go to an NT event and play along side them. I spent some time practice putting at the same basket as Ricky Wysocki, arguably the 2nd best putter in the world right now, and it sort of confirmed for me that the videos were misleading, at least to me. If anything, he actually had more arc in his putts than I did even from 40 feet. Only saw McBeth practice short putts, but if you watch these 2 in this video where there's lots of good head-on angles of their putts, you can really see the arc is nothing to be ashamed of, they both do it.
https://www.youtube.com/watch?v=hNrJooN8zqg