I think the factor that has improved hunting the most for me is definitely the internet..
I remember researching hunts the old way...Word of mouth, searching in the backs of sporting magazines, calling Fish & Game Depts., calling references, and on and on, and STILL it was a crapshoot as to whether you were going to have a quality experience...
In the last ten years, I have set up several hunts using ONLY the infomation that I got from the hunting forums, and I haven't been disappointed in one of them...
Add to that the daily pleasure that I get from reading and participating in these forums and all of the good friends that I have made on the forum and all of the technical and tactical knowledge that I have gained from people on forums like this one..
This medium is by FAR the most important improvement in MY hunting in the last 30 years...