Sometimes it can be really hard to part with it and you really don't have to. A lot of the papers, products, and colors from a couple of years a go are neutral enough to mix in with today's styles and pictures. If you really don't want to keep some supplies there are always groups such as church groups, women's organization, or children's groups that can use use extra crafting supplies and will likely gladly take your extra! Try to recycle you old supplies and mix them in with your new products. It is interesting to see how many old things like punches, are actually becoming popular again.
Keep on Scrappin'