I realized I was getting older when I started hearing Eagles songs on the 'oldies' stations. Also, when I say to my sister (who is 14 years my junior) 'when I was your age....'
You hated being disciplined as a child but when you're in public and a kid is really going nuts you think to yourself "I wish his/her parents would do something about that little brat!"
You remember when teachers/principals were allowed to discipline kids (I wish they still could!)
45's/8-tracks
turntables (not used by rappers!)
The SNL Not Ready for Prime Time Players
The Muppet Show
Computers were only something the 'rich kids' had
leg warmers
really big hair
the beginning of the fitness craze (aerobics!)
There weren't 30 NHL teams
Appliances and home fixtures were brown, or a puke green. Throw in some orange or bright yellow for the wallpaper
You remember "Miracle on Ice" before having seen the movie

New cars were less than $5000
board games (checkers, Life, Chutes and Ladders, Battleship)
You remember when cartoons made sense and were just 'fun' to watch
tetherball