You need to wake up each morning at 5:45. Take care of yo business and be outside by 6:00.
Start with some light calisthenics, just to get the blood flowing: 20-30 jumping jacks, a little jogging in place, lunges, squat-thrusts. Gargling action and some wow-wows.
By 6:10, you want to be on the road. Set an easy initial pace, enough to get your heart and lungs going well, but not so much that you can't yodel a little.
After the first mile or two, 15 minutes of running, time to find the new gear: let's call it overdrive. Drop your hands to waist level and stretch the stride, get into some heavy duty jody calls. I personally recommend anything involving the words "airborne" and "ranger" and "guts" and "danger," but you should go with whatever motivates you.
Keep that up for about 30 minutes, really shake those cords out well and build up some stamina.
At the 45:00 mark, ease off on the throttle, bring it back down to that bouncing jog. Quiet time, let those throat and jaw muscles relax.
Ten minutes of that, then drop into a walk. Shoulders back, head up, big arm swings. Belt out some Rocky Top and a God Bless the USA at full volume.
Stretch really well before finishing up...this enhances your flexibility, balance, and quickness. Try "Sally sells sea shells by the sea shore," and "Batty Bertle Bumpers bites brambles before breakfast."
Take it inside, gargle twice with tepid salt water, then go have some breakfast. No juice or coffee until after you've had a little milk, to coat and protect the vocal cords.
Repeat daily for 20 years.
Then you'll be fine for an unlimited amount of yelling.
Go Vols!