No, this isn't about the calming powers of butterflies. The Nature Plus Beetle Blog has an excellent post of relaxing beetles using a kitchen steamer. Usually, entomologists use these glass hydration chambers, but this is an excellent idea for hard bodied insects. I especially like the use of thyme oil as an anti-fungal. 10 minutes apparently is all it takes to hydrate a batch of beetles to the point where they won't be damaged in mounting. It's also a good explanation of point mounting.
I would really like to see a post by someone on removing insects from alcohol to be pinned. I've experimented with xylene and 100% ethanol, but neither of these is satisfactory for Diptera or Trichoptera. I've heard good things about HMDS (hexamethyldisilazane), but I've never been able to get my hands on any to try it out.