With today's three new Google Glass apps, you can plan a trip, book a table, and check in all along the way: Foursquare, TripIt, and OpenTable have all released official Glassware.
Foursquare, of course, allows you to check in on Google Glass, handy for a social service that really is all about doing one, simple task. TripIt will provide you travel alerts for your plans, and OpenTable allows you to make a reservation using voice commands. All in all, these do seem like service reasonably well-suited to Glass adaptations.
You can get them on Glassware store now.