A couple things I can suggest...
If you're going to be shooting JPG, or think you might need to do so, ever... Go into the Picture Controls and adjust the Sharpening setting from the bizarrely low default setting of -2 or some such to +6. You'll need to do this for all the different Picture Control presets (Standard, Vivid, Landscape, etc.) but it will be worth the sixty-seconds it takes to do. I find using the "Standard" setting with +1 to Saturation and +6 to Sharpening works really, really well. Again, that's just for shooting JPG.
The second thing I would suggest you do is learn how to use the Auto-focus Fine Tuning function. It's time consuming, and a bit of a drag, to test lenses for front/back focus issues but almost all of my lenses shot sharper images (some dramatically so) after taking the time to really, thoroughly test them. I wish someone had made me do this the day I brought home my D7100 because I was only cheating myself by not doing it. This is
the Nikon Knowledge Base article I used to fine tune the auto focus on my D7100. I found it to be the easiest and fastest method but there are others.
Congrats on the new camera! You're going to love it...
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