I've purchased a few expired domains with PR for backlinking, and I'm wondering if you guys have any good tips to help prevent them from dropping their PR in the next update? I've mirrored there sites in case I want to recreate them, but I ended up doing a fresh install of WordPress on each one and each has a few articles worth of content so far. Should I actively backlink these sites? Does link quality matter for simply maintaining PR, or can building low quality links actually hurt my PR? Also what do you think is better for passing link juice home page link (only homepage not site-wide) or contextual links in a sticky post?