g1smd - 5:25 pm on Sep 29, 2011 (gmt 0)
Pages with no traffic no external links and are poorly indexed - "410 Gone".
Pages that have an equivalent somewhere else in the site, especially if the page you're scrapping has good incoming external links - 301.
Don't mass redirect multiple URLs to one page, certainly not to the root.
Don't use a 302 redirect.