I've mentioned it before, this is what I just started doing after seeing someone here post about it...I bought a non digital small electric clock plugged into a power strip, when I start on a project I hit the on switch & work, when I'm done I turn off the switch, once it gets to 12 hours I write that on my cost list for that quilt & start the clock over. I'm curious to see how much time & money I use when making a quilt. I don't add any cost if it's fabric from my stash.
Jeri