One thing about the heel turn in socks that sometimes mystifies newer sock knitters is the instruction to "wrap and turn" when working short rows. Not all sock knitting patterns ask you to do this, but it's pretty much always a good idea as those little wraps help prevent holes along the sides of the heel where you didn't work all the way across.
It's actually really easy to wrap and turn in short rows. The main thing is to be mindful about whether you're on the knit or purl side because the way you wrap the stitch is slightly different in order to get the working yarn in the right position for the next row.
You also need to be aware of the wraps when you start working longer rows again. If you leave them where they are, that bump of yarn will be visible on your sock (or whatever else you're knitting with short rows). To eliminate it, just work the wrap together with the wrapped stitch when you come to it, either by working a knit 2 together or a purl 2 together, depending on the side of the work you are on. Easy peasy, and your socks will look better for that little bit of extra work.