One item I strongly recommend you get is a battery powered charger.
Just recently got my first smart-phone, Samsung Galaxy Note II.
After playing around I found out that it drains battery within 24h when heavily using internet or gps or other functions.
So now on the way by mail is coming a Samsung portable battery pack with 9000mAh. That will let me charge the phone 1-2 times.
http://1.androidauthority.com/wp-content/uploads/2012/09/Samsung-battery-galaxy-s3.jpg