Know that is a very old known trick. But with cata and ppl that can fly in Azeroth makes it easier to skill up herb+mining. Wow cache remembers only 4/5 nodes. So if u want to skill up fast find a area with 4/5 ores+herbs close to each other. And hit them without looting them do it clockwise or in order don't hit the same node twice. They will keep giving u skill up untill u are to high for that area then move to next area. I find it insane the ammount of herbs and ores close to each other i got few times 5 on mini map. Hopefully they don't fix this soon as ppl can use flyer now. And pls don't flame me just trying to help out as i am lvling herb and ore on few chars and forgot about this trick. And hopefully can help someone out with it