This is a little bit older, but the Varga hair tutorial by Paul Tosca is still useful when talking about creating polygon hair. The youtube video mentioned earlier is also a good reference, and a lot faster method.
As a side note, Yeti is definitely not for video game hair. Hair simulation is on the horizon, and I know at least one person here on the forums was working on it. Both AMD and Nvidia have solutions for real-time hair simulation, but at the moment they’re not available to we average folks yet.