Some say I'm part of the younger crowd here, but I have a few.
Cheap gas- cheapest I remember seeing it was 96 cents a gallon at Fort Bragg in 01.
Bricks of .22 LR for ten bucks or less, and 100 rounds of Winchester white box 9mm for 10-11 bucks.
Corded phones with no caller ID.
Cars with ashtrays built in. Last vehicle I had with an ashtray was my 01 Jeep Wrangler, when I traded it in on an 05 Wrangler it was gone.
Walkman! When I was a kid, you were cool if you had a portable CD player.
Dial up internet, pagers, cell phones that would only make calls. My grandma still had a rotary phone, I remember thinking it was the weirdest thing.
Since I mentioned Bragg and the Army, shining boots and pressing uniforms. We wore the BDUs when I was on active duty.
If you left the barracks when you were on recall, having to leave a phone number for where you'd be, and getting a cell phone so you could just leave that number and go wherever.
Cell phones- "Call me back after nine so I don't burn my minutes!"