Building links should be a balanced acivity. The sources of your links should vary evenly between:

Article Directories
Relevent web sites

With respect to directories, link acquisition should be at steady pace.

When considering directories, review the link from 2 perspectives: traffic and Page Rank transfer. Below is a list of some popular directories. I will add a review and comments to each directory over time. I will take the perspective of a telephone equipment supplier when reviewing directory categories.

directory listing costs $199/year renewal $149
page rank is transferred, PR depends on catergory, may generate trafic


Top: Business: Telecommunications: Equipment: Business Systems: Suppliers: United Kingdom

passes page rank

Directory: Shopping ~ Consumer Electronics ~ Communications

PR 2

$39 registration fee