Inactive pilot needs help

Hi all,
I got my private VFR ticket back in the early 80's but haven't flown
since the late 80's. Well, I'm ready to jump back in with both feet and an
RV QB kit.
I'm wondering what other's of you in the same position (returning to
flying after laying off for many years) have pursued as far as resources on
how to not only get flying again, but to catch up on all the changes in the
last 15+ years.
I intend to take a dozen or so hours of instruction before my required
bi-annual to get legal again, but I don't want to waste the instructors time
by making him go over lots of stuff I should already know.
Suggestions?

MJC