Upgrade to Fedora 19; Easy as 1, 2 ,3…
Upgrade form Fedora 18 to 19 with FedUp with 3 easy steps..
1. Install FedUp
$ sudo yum install fedup
2. Run FedUp
$ sudo fedup-cli --network 19
3. Executing the Upgrade
Reboot and select System Upgrade form Grub menu.
* there are some recommended post upgrade steps but they are optional, I do recommend cleaning up your yum repos with a distro sync see the link below for more info