Using these Jimmy's SmartStix Double Pointed Needles is a breeze. Start by picking up your yarn and casting on stitches as you normally would. When you need to measure your work, just use the color - coded markings on the needles. It's a great way to keep track of your progress and make sure your knitting is the right size. As for care, you don't need to do anything too fancy. After each use, simply wipe the needles with a dry cloth to keep them clean. Avoid dropping them as this could damage the aluminum. Store them in a safe place, like a knitting case, to prevent them from getting bent or lost. That's all there is to it! Enjoy your knitting with these smart needles.