The best way to lvl up fast it to partner up with a lvl 50 and just have then complete your Leve's. While they do them you just stay by the Leve person and keep accepting them and turning them in. With Crafting leve's just find the Leve that gives you the most EXP. Have a lvl 50 make a crap ton of that one item and then turn them in. Then after a while move on to higher leve's and soon you'll make lvl 50 in no time.