The only thing I can think of other than chicken noodle (seriously, it sounds like blasphemy but Lipton Instant Chicken Noodle is MAGIC) is steam. Sitting in the floor of a hot shower helps me IMMENSELY when I have a cold. If you can get those melty eucalyptus tablets for the shower, those are great. You just can't sit in the shower when you use those because um...sensitive places, menthol burns, eek.

Give your bro some snuggles for me <3