Okay, this isn't so much a tip as a warning! I broke my own rule about buying printed plaids when I was seduced by a designer corduroy that was heaven to touch in shades of red and blue on periwinkle. As I was doing laundry this morning I noticed that my old flannel nightshirt looks really ratty so I remembered this corduroy and thought I'd whip up a new nightshirt so that I could toss out the old one. After graining up the fabric I noticed that it was printed slightly off-grain. No big deal, I figured. I would use the plaid as my guide. After all it was a nightshirt so being perfectly on-grain wasn't critical. Well, as I delved deeper into this project I realized that it was all off - just enough so that I couldn't get a match anywhere. The horizontal lines were a little wavy as were the vertical lines. I finally wadded the fabric up and pitched it. An expensive lesson: 4 yards at $20/yd.