The search options provide more powerful search strategies than most alternatives. Select the best categories or conduct a search for keywords and then check out the resulting lists. High density might mean that 25-30 per cent of the items are worth keeping. Density will tend to run that high on Yahoo or the Virtual Library. Items are evaluated prior to placement on first two lists.
Search engines can pick up anything from e-mail messages to personal pages.
Little quality control. You may not copy other sites' lists without modifying them radically. You would have to eliminate 50 per cent or more of the links, add some of your own, and substitute new annotations. Even so, it makes sense to credit the original site at the bottom of the new list. Open this template file.