If you were walking round the house looking for something else to make you feel old beyond your eye wrinkles and a penchant for Radio 4, BEHOLD: we have just the thing. It's the news that The Hills (which we used to watch with an early-adult hangover after sitting through the Hollyoaks omnibus on T4) is ten years old today.

We weren't about to let that go without a mention so we had a good dig through the show to find the best life lessons that Lauren and co taught us...

1. Just because you are heartbroken with tears running down your face, doesn't mean you can't deliver an awesome sound bite

"All there is left to do is forgive and forget," Lauren told Heidi as she ended their friendship. "So, I want to forgive you. And I want to forget you." Still just so powerful.

2. When your friend displays a dislike for your boyfriend, listen up

See Speidi for details... Although to be fair they may now be the longest-standing couple in showbiz after the Beckhams.

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3. Lobs may come and go but there is no hairdo so covetable as Lauren Conrad and Whitney Port's California long highlights

Essentially this was the Noughties version of The Rachel, though it took a hell of a lot longer to grow.

4. In the US, interning pays REALLY well

Evidence: Lauren's apartment and the frequency of trips to fancy nightclub Les Deux. It's almost like some of this wasn't real. Weird.

5. If we could just nail the specific mascara: skin ratio/speed, we too could cry this beautifully

Seriously, watch Lauren do this over and over, it's like art.

6. Never accept a present without first analysing exactly what it means

If Lauren says there are rules, there are rules. Ideally she would come round to our next birthday party.

7. When it comes to your love life, it's always good to go with optimism

Then again, based on their dealings with Spencer, Brody etc, it must have been hard to retain much positivity.

8. If you practice the 'La la la it's not happening' hand move for long enough, you can make anything go away

Whitney Port: the master of the strategy.

9. In the end, you need a guy with more than just extraordinarily white teeth

Preach, Audrina.

10. Before everyone in reality TV talked about living your truth, Lauren Conrad wrote the book on – or you know, occasionally talked about – living her truth

Bonus points for the much-underused word 'shady'.