I just joined and I have a tip (this is very exciting) -

first - the sad bit - I hit a squirrel a few years ago...but considering it was a choice between veering out into traffic or a squashed squirrel...

anyway, one of the roadie guys I know told me the key to avoiding the little skitzo creatures - aim for where you see them first. That is the only place they will NOT be when you cross their path. So far (and 6000 plus miles later), it seems to work.