Very simple!
Use the Windows 8 backup appto create a system image. Normally windows will look for where to place the image and will selec a internal HDD. When the image is completed it will prompt you to create a bootable system repair Disk.
When you get the new ssd, swap it for the one that is currently in the computer and boot to the repair disk, select retore using an image. 15 Mins later reboot to new SSD.
NOTE: For windows 7 this was easily found, go to control panel, select system then back up. Create system image is on left pane.
Windows 8, for some STUPIED reason Hid this app.
To find, See:
http://www.techrepublic.com/blog/window-on-windows/restore-windows-8-with-system-image-recovery/7464
Scoot down to "Creating a System Image" to find the "buried app LOL"
NOTE: they chose to put the image on a set of DVDs - IF YOU have a Internal HDD, windows will "suggest" putting it there - PUT it there. I also copy this image to a backup external HDD just for added safety.
TO restore read down to "Launching System Image Recovery" if you placed the image on internal HDD it ill find it and ask for verification.
Alternative places to put image is directly to an external BU HDD, or a Thumbdrive (I've used all three)