YSK: If you're thinking of donating to a disaster relief effort or a support organization in general, NEVER donate food or items.

Items like food or clothing are more often than not discarded or go unused. Thousands can go to storing or disposing of these items. If you think about helping with the Harvey disaster, donate money. This will enable administrators and emergency services to get whatever they need at the right time.

TLDR: Donate money, not items.