Stumbled across this thread. Wonderful.
I have been concentrating on grain - not in wovens as I have used the pull a thread technique for ages - but on knits, especially since receiving a couple of pieces that were scatterwampus. My tip to share in case it's new to someone is to "baste" a line down a rib. In a recent project, I did a
trial layout of the pattern pieces - basted the rib line in approximately the same location as the grainline marking on the pattern. Used those to align my pattern pieces appropriately before cutting.
I had never basted a rib line for each pattern piece before, but am pretty happy with the results. So I thought I would share.
Edited to Add: Here's a
photo with the knit dress partially constructed with the basting for the rib lines still in. (In case the previous link didn't really explain the tip.)