There are so many things. Putting aside things that are more oriented to my age,
-What is now called "Classic Rock" that demanded to be played at full volume. This also included the revelation that headphones allowed you to play loud music without getting yelled at and, how cool the mixes were in stereo (especially when you were, ahem, partaking)
-Nehru jackets that were in fashion for about a week
-Muscle cars that you could actually work on yourself!
-The speed limit on the interstate was 55!
-Black light posters and mobiles
-Kent State
-Disco
-Gas was 35 cents
-The draft (I had a number but wasn't called up)
-The advent of the "Radar range"
-The BIG BAD BRUINS - back in that time, hockey was rough and exciting to watch!
should I keep going?