I've been seeing a lot of threads lately on here and the official forums basically saying some variation of this:
"I'm sick of having to cap my valor every week. I've gotta do like 200 dailies a week! I'm sick of heroic grinding! Why can't it be quicker? I need to cap my valor!
Guess what folks, can give you some insight into what's going on here; Part of the work I do is looking after computer systems used to help people with gambling problems. They can voluntarily exclude themselves from pubs and casinos; anywhere with electronic pokies or gambling activities. While I'm not an expert on addiction myself, I've had a lot of interaction with support professionals on this subject. I also play a LOT of WoW and like to analyse the meaning behind things.
In MoP, when you feel compelled to piss away hours a night getting that valor capped Blizzard is quite cleverly exploiting the same addictive reward mechanisms in your brain's lymbic system that make that gambling addict throw his life savings down a poker machine. You know you shouldn't, you don't even materially enjoy it, but you can't stop. The "win" is too compelling to throw away.
Anyway, in the hope I can keep it brief: You can give yourself permission to not cap your valor. It's Ok to say "Fuck this, it's boring. I'll take another week to get that VP necklace."
Don't burn yourself out folks. The pixels aren't going anywhere.