It's not actually a cheat. But it's smart.
The Argent Tournament valiant and champion quests award the best money for time spent because you can do most of them at the exact same time -- a 2-for-1 deal.
The valiant quests stop when you hit Champion for all your factions.
If you don't hit champion for the final faction, you can keep doing your valiant dailies indefinitely.
I got my 25 valiant seals yesterday and turned them in to my Ironforge guy. He gave me the followup to defeat a champion to become a Champion of Ironforge!
Except I didn't do the followup and logged out instead to see if I could still do their dailies.
I logged in this morning and, lo, the Ironforge valiants have my daily quests ready and waiting.
Unfortunately, this isn't an option if you've already Championed out your factions, but if you have another character who wants to Champion stuff, you can remember this trick for them. At least until Blizz changes it.