One consistent problem I have is that I link to an article and it subsequently is removed or changes its URL. Obviously this makes my blog look rather sloppy when one-third of my links don't work. It seems superfluous to have to incessantly check and recheck my links to make sure they still work. Does WordPress offer any sort of feature that automatically notifies us when one of our links moves or goes offline?
Also, are there particular news sites that have a reputation for permanently keeping their articles at the same URL, even once the story becomes old news? I've heard the term "permalink" in passing, but have no idea what it means.