I feel your pain! I started a SAS for my DD and decided to use a pieced block that I'd done before in a sampler quilt. Got everything cut out and started piecing units and realized that it would NOT work the way I envisioned because the longer diamond sides were repeated on all 4 sides & it caused me to lose the curved illusion. So I "unsewed all pieces, recut to get the extra needed and now need to force myself to start again--some give me a shove!