you can do anything with fat quarters that you do with fabrics by the yard, except you'll need more of them. it sounds like that isn't the problem. I am sure you have some that are in the same color range that can be grouped together. Make an Irish Chain, 4 patch, 9 patch, sampler with many different blocks, all sorts of applique.
Search for the charts links and look up how many squares you can get from fat quarters, then you can apply that info to any pattern out there. Convert the yardage to fat quarters, and there you go. :lol: