One year when my scrap bags were too full and my scrap batting bag was also full (and I had a number of bags for both) I took them to the local quilt show and donated them to sell. I couldn't believe how fast they sold. I felt good getting them out of my sewing room and glad that the quilt guild got the money and that someone was going to put them to good use.
I tend to keep things for my 'good intentions', but sometimes my good intentions tend to overflow and I just get overwhelmed. Then it is good to clean it out.