The one punctuation tic you seem to have is sometimes you place the punctuation outside of the quotes:
"Let's go", he said. - Should be
"Let's go," he said.
I think I'm overcoming that one...did it a lot a few years ago and got repeatedly slapped on the hand for it (figuratively, that is).
Now...should that period be after the )?
Heh...I guess this is why God invented editors. Or inspired someone to, anyway. ;-)