Allow the kefir to sit at room temperature for 12 - 24 hours.
Using a plastic tea strainer separate the kefir grains from the milk.
Refrigerate or drink the kefir milk and add fresh milk to the grains.
Repeat the process daily.
Notes
Your keffir grains will continue to grow and multiply. This will quicken the rate in which one cup of milk becomes keffir. Add more milk if you wish to keep the 24 hour cycle going or give away excess keffir grains.