Good suggestions above. I usually have 9pt or 21point, afs-c with the rear button set to af-on. Auto ISO on the D7000 is useful... I usually have auto iso on, capped at 1600 unless it's really low light, and by then it's usually time to call it a day.
There's a stickied post towards the top of the D7000 forum that's worth a read, it has some workarounds for the D7000s limited buffer ( link). The lens distortion correction feature in particular really slows the camera down.