I keep my ribbon and fibres on binder rings (I keep the spools of extra ribbon stashed away in a drawer). I have a ring for each colour and put all the colours onto one larger ring. Then I have another large ring that holds smaller rings of neutral ribbon, multi-colour, laces, and string.
The dress form is where I keep my little scraps of ribbon. I love how it looks with little colourful ribbons all over the dress part and it reminds me to use those scraps up!