Reflecting on toread is tobehuman:

• Dave Coustan says, “I use [this is good] to mark things I find particularly excellent.” Me too. Heh.
• And Ed Kohler asks about toread and howto, “Both tags do something other than describing the information directly, the way a tag for “blogging” or “php” may do. Instead, the tags refer to how people relate to the information. Do you know of any other examples of this?”