Ground layering.
Check yours and you should be able to find a lot of rooted sprouts.
If not, just cover any of the groundhuging branches with a soil, put something heavy (rock) on a top, leave tip of the branch above the ground and by the end of the season you'll have a rooted stem which you may severe from the mother plant and plant somewhere else, though I personaly prefer to leave them till spring and cut it off then.