Invest your money in mutual funds from the day you first salary is credited, never delay it.
Don't live a life for external validation. Do things which make you happy.
Get Married only when you are financially, mentally and physically prepared for it not when society tells you. The same people will not be there for you when shit happens and will even judge you for the same.
The regret of not giving your best is way bigger than the regret of failing.
Never underestimate the importance of balanced diet, good sleep and regular exercise.
The only person who care about you is yourself. Not your parents, spouse, children or friend. Be strong enough for yourself.