Aaaah, I miss the 90s more the older I get. I was 10 in 1991, so it WAS my teens:
I remember:
White Musk and dewberry
Lip gloss in as many flavours as possible - I kept two for years that had the power to transport me back soooo vividly to particular places and times...
Glittery make up and nail varnish - esp glittery electric blue nail varnish!
I remember wearing flared cords and velvet jackets and DMs.
Later lots of crushed velvet and droopy ankle length grey skirts
Chokers
Mood rings!!
Record bags with things painted on them in nail varnish.
Shopping in Carnaby street and Kenny market
Kickers in winter, paladiums in summer - with your socks folded down inside so they wouldnt show!
clumpy platform boots and sandals
Wraparound skirts, crop tops, bunches,
Those horrible pull-on black pinstripe trousers!
Bay Trading, River Island, Shelleys, Faith
Wearing your hair up bit with a central parting and two stringy bits of hair hanging down at the front!!
Heather Shimmer!!
Superlash mascara
Check shirts over Tshirts
Strappy vests and dresses that looked like nighties
Smileys, cannabis leaves, yin and yang and sun moon and stars over everything.
Everyone having loads of studs in their ears.
Trolls (or were they earlier?)
Beanie babies
Athena posters
Those 'balls' in the Hammersmith Palais etc
'Getting off' with boys with curtains!
Magic eye!!
Had forgotten Point Horror!!!
Sweet Valley High (smuggling my best friend's copies in the house as my mum disapproved!)
Judy Bloom's Foreever
Mizz, Bliss, Just Seventeen
The Big Breakfast
Mel & Sue
Heartbreak High
SUNSET BEACH! (The turkey baster, anyone???)
Dawsons Creek....aaaaaah. Pacey 
Brookside lesbian kiss
Rikki Lake, Ellen, Roseanne
Saved by the bell
Bewitched
Genie in a bottle
Fresh Prince
TFI Friday
90210 - the proper version!
Mix tapes
Placebo
Pulp
Oasis
James
Savage Garden
Lightening Seeds
The Verve
the Shine albums
Wet wet wet!!!!!!!!!!!!!
Backstreet boys, Five
Oh my god...Girl from Mars, yesss, and Size of a Cow!
Supergrass
Blur
Suede, Shed Seven, The Charlatans... too many to name!
Being on the phone to my mates pretty much all my waking hours, even if I'd just seen them, or was just about to see them
Having an obsessive intense crush on someone or other every single day from about 1995 onwards!
Ohhhh, I want to go back RIGHT NOW!