I'm a Canon guy so won't be of too much help on specifics of the SB700, but I've found strobist to be a help in the past (try to get through the dry bits, and fashion photography crap haha - there's lots that can be applied to shooting action and helping your understanding of light):
http://strobist.blogspot.com
Also worth googling for examples of their really interesting flash work in snowsports are Grant Gunderson, Dan Carr, Dan Himbrechts and Dave Lehl. Plenty of others too! I always find that collecting images I like and then deconstructing how light was used in them is very helpful.
I'm still learning myself but if you have any questions, shout out and I'll do my best.