First: Think from the users perspective, and write your title and meta description tags appropriately. (This is what google [and other] search engines use to display your link on their search results page.)
Don't overdo trying to fit too many keywords in a link or tag (i.e.. alt, title, meta).
Use text navigation on your site, and/or any image with a link has a good alt tag.
Get links, only consider PR a general ballpark figure. content and context matter most. A recip. link is better than no link, A link from a page about a subject directly to your internal page about the same subject is optimal.
Make sure you don't forget the users perspective, and write more
good content.