Edit to add:  I also made an add-on side tutorial on the importance of the number of hair segments you choose to use and showing my thoughts on what the ideal number should be for natural looking bends and curves in your hair motion and sims.  Forgot to post this one initially, just adding it in:

Carrara Hair Segments
https://www.youtube.com/watch?v=JK5riUH3kEQ

I'm also realizing I forgot to mention the 'Density' setting in the Simulations tab and what that does.  It doesn't actually add thickness to the hair or number of hairs, but instead changes the simulations as if there were more hair density (which impacts the way the hair moves).  I completely forgot to mention what this parameter does in the tutorial but it's such a small description that I'm not sure it warrants another tutorial video all on it's own.