What things, that we might overlook, help retain link juice on the site?

[Jonathan1979]

Since subscribing to Moz, I have been focussing alot on some of the more technical aspects of SEO.  The current thing I am finding interesting is stopping link juice leaks.

Here are a selection of some of the things I have done:

1. I have cloaked my affiliate links - see http://yoast.com/cloak-affiliate-links/
2. Removed some html coded social share links within the theme, and replaced with javascript plugin (http://wordpress.org/plugins/flare/)
3. Used the Moz toolbar to view as Google, to see what google is seeing.  Removed some meta links at the bottom of blog posts (author etc) that were duplicated.

Now, I don't intend to go over the top with this, as links to social accounts on each page are there to encourage engagement etc, but are there any things you may have come across \ tips that people may have overlooked but perhaps should look out for?

As example as some of the things that might be interesting to discuss: Are too many tags, categories bad?  Do you index your tag, date archive pages?  Does it matter?