While waiting for my MB-D11 grip to arrive, I did some research on this issue.
Thom Hogan's eBook on the D7000 (800 pages long) had all the details. It turns out that even when the camera is turned off, some viewfinder options remain on and cause a current draw. These viewfinder items are Warnings, Gridlines. Another big power hog pertains to LCD and Control Panel screen duration during Replay, Menus, Info and Metering.
What others have said here about resting your finger on the shutter button unnecessarily is also important.
Here is what Thom Hogan says to reset in order to prolong battery charge:
Menu C4, D2 (off) D4 (off). Set C4 as short as you can stand. I was surprised how quick a readout satisfies my "geek urge". 4 sec is enough for me. Playback (displaying an image on the LCD after the shot is taken) really sucks up the power. Resist the temptation! Don't be a "chimper". Be a grown up. Save power.
I'm on day 4 with the camera off. Charge still registers 100% As Gene Wilder exclaimed in the Frankenstein movie ....... It's alive. ALIVE!