We all need space for ideas to blossom and creativity to come into play and that is why physical surroundings are also very important. The more we declutter , the more space we make for creative thought.
My bedrooms and my living room is full of shelevs with books and magazines most of which I have not referred to during the last year. Take some large boxes label them 1,2, 3... and start putting the items away recording or writng somewhere what items you are putting in each box so if you do need to refer to it in the future you can easily retrieve it. I did this over the weekend and I feel so much lighter.