I apologize if this was asked previous or if it is incredibly noobish, but how do you store bills to keep them relatively safe? Are there holders or sleeves that one could buy?
Yes holders/sleeves, and then those into binders or boxes. Here's some reading: http://www.cointalk.com/t32306/ Dave
If you plan on storing your notes in sleeves make sure you use Mylar-D, Its the best protection for your notes, You can get this On e-bay and other sites!!