I'm not aware of any way to do this. Some Members have noticed significant 'Other' - several GB - and have looked at ways to try to remove it. Some have even gone as far as to restore their iPad when the 'Other' was so large that it was inhibiting the download of new apps or movies. I've yet to see a 100% sure way of dealing with this, though. Maybe other Members will give us their advice during the day.
I think the post is in an ideal location - it's a General Discussion as far as I can see.
I'll have another look around too and see if I can find out any more on this topic, because it has come up a couple of times.
Tim