Mosaics -again

I started making a mosaic on the top of my coffee table LAST YEAR but had to stop when I ran out of the little tiles. Ooh, but now I have more tiles so I am rounding the finish line. It is very intense at this point and time consuming, but it is hard for me to walk away from it, even to go to bed. I have the little tiles all laid out according to color like I do with my pastels and...as with my pastels the whole living room is a giant mess with pieces and colors scattered all over the place! I even have a drop cloth!