Ok here goes to help you...
Best shoe shine...right where "D" concourse security let's out so if you use "E" for TSA precheck go in and turn right at the Starbucks and walk down the isle and you'll see it on the left. It's money for shines, there is no set charge so you have to tip. I usually tip $10-$20 depending on my cash sitch at the time. There is another one at "A" security point but I have not tried it.
Something to consider...just because your ticket says your gate is C etc. you don't have to enter at that security check point. So many people zombie at A for Delta or B/C for American. Move down to D or E and you can access any gate from there but the security lines are way shorter and easier.
Easiest Starbucks is the "A" concourse security point and they are fast but "E" security one isn't far behind.
There are tons off new food places but most people hit the seafood/bar place down in the "C" concourse. It's right by the burger place across the way and both are really good. If you need your Bojangle's fix it's down on C concourse at the end on the right. I hear the sushi place where the rocking chairs are in between B and C is really good.
Don't bother with the free Wi-Fi as it sucks and clogged so stay on LTE.
If you can get in one of the rocking chairs in between B and C and enjoy the people watching.
Parking...3-6 days use the Daily East/West Deck. Longer use the long term parking but allow an extra 15 minutes for travel to the airport. Be advised when you get back the Daily East/West deck buses cycle through three times the rate as the others so it costs more but faster.