Linking to your own pages on your homepage?

[eooc.box]

I was curious: lets say a website exists, and it features tons of sub-sub-pages (IE: reviews of different models of cars)

First: Will linking to these sub-pages (yoursite.com/honda/X34LA-ModelName.html) from your home-page using anchor text (just like a backlink, but on your own site) do anything for you? Or would it actually do harm?

Also what about linking to a bunch of sub-pages from your index with exact anchor tags (IE: exact Model number and name) - and lets say you end up with 40 links on the home-page with exact anchor text linking to sub-pages. Essentially will this harm or do good, or just do nothing?