As far as rain riding goes, the best advice I can give is ride in the rain when you aren't forced to.
Do the "weekend loop" even if it is raining, sure, slow down, be more careful, but ride. Experience is everything, and riding when there aren't other pressure (like heavy commute traffic) makes it a lot easier to cope with.
I enjoy it, around here there's much less traffic and far fewer cops when it's raining.
It is easier if it's a dirt bike or dual sport bike, slides are easier to recover, but it's not life threatening on sports bike, you just have to be smooth.