What do you do when you lose motivation?

I had a quilt I was excited to make. I bought the pattern, picked out my fabric, cut it ALL out. And now I have no motivation to sew it. Other projects are catching my attention instead. Do I pack it up and put it away? Push through and hope the excitement comes back as I start piecing it? This is a just-for-me quilt, so no one is expecting it. I feel kind of disappointed in myself over this.