Menu Bar layout question - Padding and Spacing

I am trying to run a vertical menu bar down the side of a page of content as quicklinks to other pages and I'd like to make the following changes but can't seem to get it right.

1. I'd like to decrease the padding below each link so the gaps between each line are much smaller than they are at current, and
2. I'd like to only have one link per line, whereas at the moment where it can the system is putting 2-3 links to a line.

Any ideas on how to fix these 2 little things would be much appreciated
You can see the example here: