You can use the Save as command to save individual messages in Text or HTML format. To save multiple messages, you'll need to use VBA or a utility. See Tools for a list of utilities that can automate the process and save messages in a variety of formats.
For a small fee, Southwest Airlines' Early Bird Check-In allows passengers to check-in to a flight automatically up to 36 hours prior to the flight's scheduled departure time.
As far as ornithologists know, northward migration by Ruby-throated Hummingbirds in spring is tied to photoperiod on the birds' wintering grounds. Hummers in Mexico or Costa Rica don't watch the Weather Channel, so they have no idea what the temperatures are like in the Carolinas or Montreal in mid-March.