I'm sure this has been done before but:
Men are just ordinary people, they aren't going to rescue you, be your soul mate or necessarily be around for ever, they are not princes from fairy stories so don't live your life waiting for that fairy tale marriage.
Fairy tales don't exist, neither do happy ever afters, romance forever or any of those other things we are fed from a young age.
Never rely on a man, get a career, be ambitious.
Don't have more children than you can comfortably afford to raise on your own.
If you are very lucky you may get a nice man who you can rub along with for the rest of your life but 50% plus of marriages don't last.
Be selfish. Don't sacrifice your hopes and dreams for someone else, be who you want to be. Have boundaries. Have self respect. Don't allow yourself to be treated badly or taken for granted.
Learn how to manage your own life, bills, finances, everything.
The only person you can truly rely on is yourself.
Be happy, do things that make you happy.