Non-dispositive motions (i.e., motions to compel, etc.).
Remember that judges hate discovery motions: therefore, if
you can resolve something without a motion, you do so.
Call, memorialize in a letter, ask nicely and specifically.
Then try again, memorializing the lack of response, and
say that if you don't hear, you'll be forced to file a
motion to compel. You don't have to accept deficiencies
in discovery, but you do have to be nice about it.
Check local rules about pre-requisites for motions to
compel, also.
Except for requests to admit, be generous with extensions.
Assuming you're not up against some terrible deadline
(like a noticed deposition or a scheduling order), and
it's not a request for admission, just say yes.