You want to keep your
plant from blooming - if it starts to bud, definitely cut that sucker off!! It will kill your
plant!
As soon as you see even the tiniest pokey of a stalk, pinch it off. If you let it go (especially by the time you see a
flower), your
plant is dead. It takes up so much of the energy that it kills the remaining
plant.
It is complicated to gain
seeds from a bloom, and takes much time for them to grow into big
plants (we're talking years) - not worth it.
The best way to get cuttings from it is to tear a leaf off, making sure you get some of the white rhizome at the very bottom. Lay it down on top of the soil, cover it up just a bit at the base, water and wait.
The only way to make it grow bigger is time, sorry to say!