Hahah, if your lazy like me you could just do what I do
I just grab the whole clump, kinda pull it straight up in the air, but not too hard, then cut about 1/2" or so down from the tips. It actually does really well growing afterwards.
Sometimes I do just cut each stem about a set of leaves as well. But other times I'm just not in the mood to be sitting there cutting for 10 minutes!!