The Daily and Monthly achievements now give you jugs of Karma worth 4.5k (1 for daily 10 for monthly). They're account bound so you can use it on any char.

TOP TIP: the jugs are affected by karma boosters, so grab a guild karma boost banner, a karma booster if you have one etc etc, and anything else that adds to your karma gain, then use the jugs. I got 72k karma from the monthly jugs, as opposed to the base 45k, which is a nifty difference.