There are a lot of tutorials on how to sync animations to specific points in audio. Unfortunately many of them rely on scrubbing the audio layer in After Effects and showcase the various ways you can do that.
THERE HAS TO BE A BETTER WAY TO SYNC ANIMATIONS TO MUSIC IN AFTER EFFECTS!!!!
Well, RockerRusty cut his multimedia teeth on Macromedia Flash! He developed a method in Flash to quickly mark where animations should start and stop and has converted that process to Adobe Premiere Pro and, Adobe After Effects. Yeah, it took two applications. But through our detailed process of investigation, analytics, and satisfied customer surveys (only the satisfied ones... dissatisfied customer surveys take too long to delete all the expletives), we have definitively proven this way is the simplest and fastest.
If I wasn't RockerRusty I'd say that guy was about as cool as cool can be. But since I am that guy, I'll wait patiently for you to stroke my ego for me. Because THIS.... THIS is some cool time-saving stuff right here that gets you back to rocking out!