Milestone birthdays have a way of demarcating a fresh phase in life: new haircut, new goals, new box to check on surveys. What they don’t call for is an age-appropriate overhaul of your beauty routine. Lately, makeup whimsies once relegated to a certain youthful demographic—high-shine glitter, colored liquid liner—are increasingly finding a wider audience among people tapping into their expressive potential. Still, the shift into the next decade is a good opportunity to check in with your regimen and take stock of your changing needs.