The most immediate problem with this behavior is that you quickly start chewing up storage space with stuff that doesn't have a purpose. The next problem is that you've just burdened yourself with having to find a project that fits your supplies. This is the exact definition of putting the cart before the horse.
|Not my actual stash|
Yarn is really project specific - more so than fabric or beads, in my opinion. For any given project you need the right weight, style, and yardage of yarn and, if you're picky like me, you also need the "right" color. It might be easier to work through stash if I wrote my own patterns but...
|85% of my yarn stash|
The lack of storage space in my house requires me to be parsimonious with my stashes. As I mentioned in a previous post, I've turned one room into a craft room so I've recently been forced to assess my stash and figure out how best to store it in the new space. This exercise has been a good one in that I'm much more aware of what I currently have on hand and it's spurred some really creative ideas about what to do with all of it. I'm talking yarn and fabric here...
The beads remain untouched. They sure are pretty to look at though.