If you're doing world bosses, camp your alts near them. For example Oondasta. Log an alt, hit the boss, alt f4, lot another alt, hit the boss, alt 4 etc...
Repeat until you done this on all alts, kill him on your main. All your chars will get loot in the mail. This also works on sha/galleon. Not sure if its an exploit or not, just thought I'd share it.