I buy fabric all the time without knowing what I'm going to do with it. Sometimes I have to buy just a little more fabric to make a certain quilt, or I have to much for a quilt I'm making, but it will get used one day. I bought some basic beige with a light white print on it years (12) ago. Really pretty background fabric. I think I bought 3 yds at the time, and I now have just inches left. When I pulled it from my stash, I had no idea what I was going to do with it. Then one project needed a little and another a little and so on.....and just to build my stash, I now buy full yds. even if the pattern calls for 1/4 or 1/2. I'm doing a fine job of building my stash and running out of room.