Don't get doped into paying for parking. You'll see people selling "$20" parking all over the place. Parking is free on property.
Don't bring a phone with you or try to sneak one in....you'll just give yourself a long walk to the car.
I'd start to look for lodging now, and even at that, it will be crappy and expensive. Good option is staying in Savannah. You get a good night prior and you're a "short" drive the rest of the way to Augusta.
Walk the entire grounds. I started at one and walked it till 18. If you never been, it is worth seeing every hole. Wait till your 2nd time to plop down at amen corner or 16 for the day. First time you need to see ever hole, visualize every shot.
Go to the shop first thing. The line will get insanely long. So if you walk by and it looks short, jump in there, because it won't be short for long.
Enjoy!