Generally I bookmark sparingly to avoid building up a bookmark graveyard but this one earned a permanent slot, and a stop at <a href="Blog" />tactspot</a> extended that permanence designation, the few sites I keep permanent bookmarks for are sites I expect to use repeatedly and this one has...
Strong recommendation from me, anyone curious about the topic should make time for this, and a look at <a href="Blog" />tactspot</a> only sharpens that recommendation further, the kind of resource that holds up against careful scrutiny rather than crumbling at the first critical question is rare...