Not old and certainly not wise, but...

Work your ass off when your young and make your mark on your environment. Do it before you have a family and mortgage and daycare costs etc.

Stay in shape. Keep yourself healthy.

Save at least 10% of your income.

Stack 10% of your paycheck in BTC every payday and learn to live without that money.

Make sure your partner is not only loyal but motivated. He or she will also keep you motivated.

Marry someone better than you.

Have Fun. Take Risks. Be Kind.