I loose things while I working on them because my desk top is always a mess. I'll give up, re-make it and then find it stuck to my sleeve.
On the positive side I rarely loose something because I don't know where I put it. I've organized my craft room so that everything that is similar is in the same place and labeled. I know where things are but every now and then I'll do a re-org and that's when I need my labels. Ask me what I had for dinner and I'll have to think about it, but ask me where I keep google eyes and I can go right to it!