As a relative newbie, I'm learning a lot with each project. That is, as I'm sure everyone knows, both good and bad. On my current quilt I did cut the sashes and borders so they were very long and that was good as they don't stretch. But I could have cut them with more accuracy (if I knew how). Plus after I put a few on and noticed the somewhat wavy sashes, I remembered that it would be best to put those pieces on the top as that wouldn't stretch out so much. There is so much to know when quilting!! Hopefully, at some point I'll be able to remember it all.
Also thanks for the reminder about measuring the borders. I think that's a difficult thing to do as well.