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    18 Hard-Hitting Life Lessons Millennials And Gen X Wish They Knew Way, Way, Way Sooner In Life

    You live and you learn...literally!

    We asked the BuzzFeed Community, specifically people 30 and older, to share advice they wish they had known earlier in life.

    Here's what they've learned:

    1. "Choose your battles and know when to walk away from people."

    Jennifer Lawrence as Katniss crouching down with a quiver of arrows on her back

    2. "Treat mistakes as life lessons and you will have fewer regrets."

    3. "You don't need to be in a relationship to be happy."

    Penn Badgley in a suit with hands up against a window, showing a surprised expression

    4. "Adopt healthy habits early and they will be easier to maintain."

    5. "You can do everything right and still lose."

    6. "People in your life are like characters in a book."

    7. "Always practice safe sex."

    Animated characters, a smiling dragon creature next to a boy with a surprised expression, from the show "Big Mouth."

    8. "Do it anyway! It’s your life; only you know what will work, fulfill you, and make you happy."

    9. "The less people you chill with, the less BS you deal with."

    10. "Get a High-Yield Savings Account (HYSA), ASAP!"

    Jamie Foxx portraying a lawyer in a courtroom, gesturing during an argument

    11. "Be the better person by being a good person."

    12. "Embrace change."

    13. "The longest relationship you'll have in life is with yourself."

    14. "If there’s something you want to do, don’t wait for friends to do it with you because you’re scared to venture alone."

    15. "Regular bills like utilities, insurance, cell phone, etc. are not reported in your credit history unless you don't pay them."

    16. "Find friends who share common interests with you instead of just sticking with the friends you have history with."

    17. "Love yourself and be grounded in who you are."

    18. "If you keep looking in the rearview mirror, you'll miss the beauty of the road ahead."

    Woman driving a car, focused on the road, with a man standing on the sidewalk in the background

    Want to add to the list? Share some valuable life advice in the comments below!