i have just started 2 new characters in bc, a paladin and a rouge both blood elves. i was thinking about trade skills that would be most useful in conjunction with both classes. i'm very inexperienced so the best i could come up with was smithing/mining for the paladin and enchanting/tailoring for the rouge.
that way i could mail weapons/armor to my rouge who would enchant and then either mail them back or just use the enchanted weapons with the rogue. the only real doubt i could come up with is with the tailoring since i guess i might be able to keep my enchanter busy enough scraping weapons/armor i mail that i wouldn't need the scrapable cloths that tailoring makes.