The loop stitch is normally a simple variation of the sc, in the case of my newest pattern it is a variation of the hdc.
1)Yo, insert your hook into your work just as you would if you were going to do a
2) Wrap the yarn over your index finger (the one not holding the hook).
3) First hook the right side of the yarn looped over your finger and then the left side, and then draw the yarn through the stitch as you would in a hdc (you should now have four loops on your hook).
4) finish off the stitch as you would a hdc, by hooking the yarn again and drawing it through all loops on your hook.
Repeat in every stitch.