Re: Patience & over calling.....
Hard one to answer as every situation is different.
If I set up on a roosted bird, I never call loud. I use very low 3-5 note yelps and very sparingly. No matter how crazy he is on the limb, and no matter if I hear hens with him or not.
If I strike a bird shortly after flydown and he rips my call immediately after I finish then I may be a little more agressive, using excited yelps with double clucks on the front end to jazz him up. As soon as he starts my way, I tone it down, and really cluck or double cluck every minute of so to check his progress. No more yelping unless he hangs up.
I could write a book on this stuff and how it could be done but here is a little more concise answer. Use cutts and cackles very sparingly. I will cutt at a bird which I have been on for a little while who won't budge, usually I will plain yelp, he blows it up, and I come right back at him immediately with a short cutt (pop, pop pop, pop) with a mouth call. 99% of the time he will climb all over it. Put your calls down after that for 5 minutes. Plain yelps of 3-5 notes with varying cadences and varying volumes in a sequence are key. Start low and end slightly louder, or start with a long drawn out yelp and end with short yelps in a series.
Silence is huge as well, when birds are inside of 75 yards, use subtle cluck, low yelps to seal the deal, but silence is very important.
And most of all be patient, turkeys have zero sense of time, be aware of that, and understand that you might be in for a 4 hour battle before he finally breaks.
Too many thoughts on this stuff to put it all in a post. Biggest mistakes people make, are long yelp series with no tone change or "yelp inflection". Using one call, and poor sounding calls as well. Being too freaking antsy and wanting to relocate. Wanting to hear themselves call far too much. Doing the same series of calls over and over and over. Yelp yelp yelp, cluck cluck cluck, is what I hear others do continuously throught out a sit down with a gobbler. Mix it up, yelp for a while, then only cluck, then yelp twice, cluck once etc etc. Purrs are worthless. Learn to whine on a friction call, it is deadly especially on the front end of a yelp series.
One last thing, buy quality calls. Folks usually only think about how the call sounds right there, they never think about what that call sounds like at 100 yards or further. 90% of the stuff at Wal-mart or sold in stores is not worth the money even the cheapest of the cheap. Save your money and buy high quality calls, it is the link between you and the bird. For example plastic pot friction calls sound hollow and unnatural past 75 yards, while wood pots resonate and carry a tone forever. Not saying you can't kill birds with cheap calls, but saying high quality calls are far better for consistently killing lots of turkeys.
JMHO