If you do not use hibernate, just open a command prompt as admin(start -> cmd right click run as admin[or cmd control+shift+enter] say yes to UAC).
Powercfg -h off <Enter>
This will clear out the 12gig file.
As others have said, you can reduce the page file. I set mine to 4096(4 gigs) for a system with 16 gigs of memory, but you can go lower. I do NOT recommend taking the page file off.
If you disable or reduce system restore you will also save space over time.
Last thing is to make sure windows ran its WEI(Windows Experience Index) since that will detect the SSD and do some optimizations and tell it to not auto defrag the thing.
Check out that page file and NO I did not defrag an SSD. It was my Windows 8 test. Actually got it to be very small after removing that and clearing some stuff out.