Simon Willison: “My favoured attribution method is the "via" link, as demonstrated at the start of this entry; I even use it in my blogmarks. One problem that I used to have with attributing interesting links, described here by Meri, is that when you browse with multiple tabs or browser windows it's easy to lose track of how you got to a certain page thanks to a "broken" back button.”
My favoured attribution method is to pretend I'm not doing it. In an entry about Marty Beckerman, I quoted the subject then the person writing about the subject, without mentioning that I had gotten to the former via the latter. That's because I have no set policy on "via" links, and sometimes I see insight in the breadcrumbs.