A Technically Right and Wrong Way to Long Toss?

You throw with good mechanics. Elbows up rotate torso and finish properly. No windup but you can use a crow hop as the distance increases.
Start short work long and then work back to where you started.

For pitchers, Tom House teaches says that long toss should only be done to a distance where proper mechanics can still be maintained.

I just read an article where Greg Maddox says he throws long toss up to 300 ft. I doubt he can do this with his normal pitching mechanics.

To throw that far you need to crow hop. Lt is not pitching but you can maintain the eesentials of good mechanics as I mentioned above.

Before a game I witnessed Jason Jennings easily throwing 200+ feet... and I mean effortlessly. I wouldn't be surprised if the pitchers could maintain it for a while longer.

I agree with BHD. Long toss is as the name implies and not “long pitching”. Long toss is a generic routine used for all positions but I admit I have also seen some position players modify their long toss to make it fit their position at times. Outfielders will crow-hop and catchers will occasionally do their special footwork and practice their transfers but for the most part it is just an arm strength builder. Actual pitching mechanics are very critical. I think I would discourage the “pitcher specific” movements while long tossing simply because the lack of mound height and the increased distance could modify their delivery mechanics when they pitch.
Fungo

SF SAM - There's good information on this page of the Jaeger Sports site. See "station 5 - Long Toss" of his Arm Strength and Conditioning Throwing Program.