I played a lot of Frisbee, mostly just catch between my dad and I, growing up. I've always been able to rip an Ultamite disc farther than anybody I ever came across (not saying I'm the best by any means, I only played a lot of pick up games). The transition to Disc golf was simple, picked up a Valk and was able to rip it 350 from day one. (not trying to say I'm awesome, just telling my experience, answering the question).
My advice (take it for what you will, I'm still pretty new to the game, but play a sh*tload):
First, research: watch videos, read, ask locals, watch locals, hang out in these forums, watch pros, ask pros, etc.
Next. You know what a good throw feels like, analyze your throws.
A. Step up to the shot.
B. Visualize. What should the shot look like that you are trying to throw?Iimagine the disc leaving your hand, imagine what it feels like to get that rip, imagine the flight path that you're trying to throw and how your body is going to make the disc do that.
C. Grip 'n Rip
D. Analyze (without over thinking). did the disc do what you wanted it to? If so, remember how that felt. If not, why? (Wrong disc? Early release? poor grip? Late release?) and what will you do to correct it.
E. Repeat! Practice, practice, practice. Play more courses, play with more people, just get out there and play!
I find that if I'm not analyzing my throws, I just walk up and throw, maybe curse a little bit, and I'm not improving. Visualization is a huge factor, if I have a poor throw, most of the time I find that I didn't visualize it before hand.
Good luck and keep chuckin! Happy discing.