years ago an organizational professional made a suggestion that I have used with my workroom, my store and when I had to empty my parent's home (they were hoarders!). Do not look at the whole project - look at it in segments. Then it doesn't seem so daunting and you feel happy with each little accomplishment. Sounds like you have the idea with wanting to label your containers - do that and then stop and feel good at step one and plan step two. You will be surprised that you keep going and not feel quite so overwhelmed. As someone who has organized (for now) her workroom, you will not believe how great you feel when it is done. And such a HUGE timesaver to have things is places that make sense instead of digging through the same stacks over and over again! good luck.