Flywheel copy writer Jill Percia works on her fitness to a Fergie degree and boasts a magical mane that looks good even after 120 minutes of Flywheel (we’ve done it, friends). The Brooklyn native always looks chic, manages the delicate balance of the appropriate amount of dog photos on Instagram and can selfie like no other. This savvy gal is in the know about pretty much everything, so I tapped her to share her Five Rules For Life. Here they are, in her words.

Related: Women’s Health editor-in-chief’s Amy Keller Laird’s Five Rules For Life

1. Take care of yourself. 

After a particularly hot mess of a summer in my late-20s, I had an epiphany, and it was that you only get one body, so you have to take care of it in order for it to look awesome and perform well. I stopped living on bagels and pizza, drastically back on drinking (oh, hi, more money in my wallet), started getting enough sleep, and began working out regularly. The perks of getting healthy go beyond looking great – your entire quality of life improves. I mean, I still don’t eat like a saint. Every couple of weeks, I’ll tip the scales at 16 Handles because fro–yo is in my DNA.

2. Better with age is a real thing. 

I found my first gray hair three weeks ago and it sucked, but whatever. I’d never trade 31 for 22! I cringe when I hear people complain about getting older or hitting a milestone birthday. Aside from the occasional, brief, crappy bump in the road, if you aren’t getting better with age, you may need to reevaluate your habits, hobbies, friends, career, and/or overall life.

3. Have hair that makes you happy.

I’ll never knock great skin – it’s super important — but it’s definitely the popular kid of the beauty world. I think hair — I’m talking hair that makes you feel fan-freakin-tastic — is so transformative. Science backs it up! I’ve had blonde bobs and worn waist-long, espresso-colored extensions, but I’m blissfully confident with a few honey highlights and my long layers. But happy hair is different for everyone. If you feel hot with a pixie cut, by all means go for it. I’d without a doubt take a few wrinkles if it meant having happy hair forever.

4. Be the best version of yourself. 

I spent (no, wasted) years on wishing my legs were longer and thinner and more Gisele-like. When I realized they’d never get there, I did what I could with the suckers and squatted, lunged, cycled, and ran until they were strong and toned. Making peace with your body, or parts of it, is a phenomenal feeling.

5. Screw the haters.

I kid you not, my mom—who is not a regular mom, she’s a cool mom—had this written on my birthday cake this year, and she’s right. There will always be people who don’t like what you do, how you look, or things you say. Delete them from your mind and life, and keep doing your thing.

Thanks, Jill!

Stay tuned for more Five Rules.

“Five Rules For Life” is a series on Rouge18 in which I ask others to share their five rules for life about anything and everything. You can learn a lot about a person by reading which five things govern their actions, no?