Take the Youth Protection Training and the Boy Scout Leaer Fast Start on-line on the BSA's Online Training Center. Then do the New Leader Essentials and the Boy Scout Leader Specific training. This should get you what you need to know about how the program has changed in since you got your Eagle (my wake-up call from how things had changed when I was a Scout was when I saw a woman wearing an OA sash ...). After that, give it a year and then sign up for Wood Badge. That's a LOT of fun.
Also, go to here and take a look around. Especially, click on the Guide to Safe Scouting link (a.k.a. "G2SS"), download it, read it all, and keep it on hand.
L