CAustin,
I am out of the country with poor internet but came across this thread. I haven't had the chance to read it yet, just glance at it. If I am repeating others, I apologize.
The only technical advise I would give is buy Buzz Carlton's video on shooting elephants. A number of elephant are shot in the video with good and poor shots. Buzz breaks down the shot on the video. It is the best that I am aware of. I am sure there is a lot of great technical advise in the posts up to this point, so I won't touch on any more.
Regarding the overall experience
Very few hunters have the resources to hunt an elephant. Consider yourself blessed. This will probably be one of the pinnacles of your hunting career.
Taking an elephant is a somber and touching experience for most of us. The very best advise I can give you is when you take your elephant:
Spend time with him. Touch the skin. Examine the grain of the ivory. Look at the character in the chips and broken spots in the ivory. Think of all the branches broken, trees overturned and boulders pried loose by those tusks. Examine the ears. The tares and rips. Massive blood vesicles run through those (air conditioning systems) ears. Look at the soles of the feet and appreciate the hundreds of thousands of miles they have walked. Cut off the tail and be proud....bald or harry. Feel the grain of the skin. Think of what your new belt/boots/recliner or your wives new purse will look like with that leather. Examine the massive trunk. Feel and examine the worn molars. Look into the eyes. etc. etc. etc. Spend time with your elephant......he is YOURS! You have earned this time. This is truly a special moment. Take dozens and dozens of photos.
A good PH will let you do this and more. If the PH is pushing you for time tell him to leave you alone. This is your elephant. Cherish the moment. Shed a tear if you want.
Eat the meat every way you can. Tongue sandwiches, steak, tail soup, kabob, curried, chicken fried, biltong etc. Watch the butchering process from beginning to end. Eat the meat cooked during the processing.
Shooting an elephant is a humbling experience. Embrace the entire process from planning to end. I hope you have a blast and the time of your life.
If I can help/answer any questions, feel free to pm/call me at the end of the month. I will be back in the US the end of Feb. Not sure if this will help but this is my experience if you want to read it.
http://www.africahunting.com/threads/zimbabwe-nyamazana-hunt-march-april-2014.15574/
All the best.