I cook loads at a time, and as others have said, just freeze it in sandwich bags. Lasts ages just like any other food in the freezer and at a push I defrost it in the microwave BUT GENTLY! I start on 'defrost' for a period (in 30 sec hits) and then check it. I sometimes up it to 'medium' once it starts to thaw.
Never had a problem and I'm usually using it on the hook rather than laying down a carpet so quality is always crucial...
Just remember not to be in too much of a hurry and it will work okay!!
Regarding long term; If I'm going out many times in a two week period I don't freeze it but rather pop it into the fridge, so although it is not 'wronk' as such, it is not certainly not fresh! (You can tell it is losing its freshness as it starts to become sticky, sort of!)
Cassey (above) seems to think it is okay when it is 'high' and who am I to argue!!