Most crocheters and knitters know that when you take part in this sort of hobby, you will have LOTS of leftover yarn and nothing to do with it. You can do many things with your leftover scraps like granny squares like on the back of Roseanne's couch:
The granny square is quite easy and is actually the first thing I learned how to do at age 9! They are worked in the round in almost a checkerboard pattern. There are really easy patterns all over online for free!
Another thing you can do with your scraps is to make amigurumi animals:
Another afghan or scrapghan that many people make is a ripple afghan:
These LOOK difficult, but are actually quite simple. It is a matter of strategically skipping stitches and doubling stitches. I made a ripple scarf last winter, but maybe I'm the only one that loves it, because it has not sold!
All of these ideas are great ways to get rid of scraps; however, I did not go any of these routes 5 years ago. Yes, 5 years ago I decided to destash and started double crocheting with 3 strands held together using a J hook. I have been adding to this blanket for 5 years now. It is currently around 8 feet wide and 4 feet long and getting longer all the way! I added about 6 inches yesterday. Now...this could have been done probably in a more pretty fashion...but I really love the random mixing of the colors! Sorry the pictures are so terrible, but I have camera issues at the moment. BOO!