Do you fly much? If so Tripit is worth a look. The free version lets you store your travel plans, i.e. hotel, flight, car hire, appointments, etc. so you only need look in one place to view your itinerary – this can be on your phone or on a website if you prefer. If you try the pro membership, you will also get flight tracking which will alert you by SMS or notification when there is any event affecting your flight – e.g. delay, cancellation or last minute gate change. If your flight gets cancelled it will be ready to suggest alternatives. It sometimes can even tell you which carousel to collect your bags from- a very useful app for a frequent flyer.