Of course I remembered your birthday!
Keep a master list of friends and families (even co-workers) birthdays in Evernote. Keep expanding the list and Evernote will keep it in sync aross all your devices and available anytime.
Going on a trip? Get organized with Evernote. Put your travel itinerary, hotel confirmation info, flight confirmation, tour and show confirmations, things to see & do list and all your directions in your Evernote account. Then, you can access them all on your mobile device, laptop or on the web.