So, you have just gotten yourself a nice new pair of needles, and they come packaged like this:
You can see the cord of the needles is looped around twice, this is good! When you store your needles, try and store them in this same way, it will help keep them from becoming too curly and help retain their shape. Some longer circular needles are looped around 3 times, and that is fine for a needle that is 47" or 60" long.
You can also store your needle in the package with one large loop:
Try and avoid storing your needles like this:
Wind your needles back into one or two loops, try not to just jam them back in the package. You want to try and retain the shape of the cord as best as possible.Also, don't wind the cord up too tight. If they live like this for a while, it will make them curly and hard to knit with.
When you are knitting, take care to not bend this joint here.
If you bend this joint as you knit or when you store your project, it will kink the cord there and make for a difficult transition between cord and needle, and that's not fun to knit with!