www.WebConfs.com tool

An iLocal Market Research Tool

Spiders don’t read images but they do read their textual descriptions in the tag, so if you have images on your page, fill in the tag with some keywords about them.

Also:

Links – internal, inbound, outbound

Anchor text of inbound links
As discussed in the Keywords section, this is one of the most important factors for good rankings. It is best if you have a keyword in the anchor text but even if you don’t, it is still OK

Origin of inbound links
Besides the anchor text, it is important if the site that links to you is a reputable one or not. Generally sites with greater Google PR are considered reputable.

Links from similar sites
Having links from similar sites is very, very useful. It indicates that the competition is voting for you and you are popular within your topical community.

Links from .edu and .gov sites
These links are precious because .edu and .gov sites are more reputable than .com. .biz, .info, etc. domains. Additionally, such links are hard to obtain.

Number of backlinks
Generally the more, the better. But the reputation of the sites that link to you is more important than their number. Also important is their anchor text, is there a keyword in it, how old are they, etc.