Diversify your portfolio. Spread your savings across a number of different investments. Don't keep all your eggs in one basket. Don't give away your future wealth by creating unnecessary debt now. Know the difference between good and bad debt.
Good debt generates a positive cash flow.
Bad debt generates a negative cash flow. Avoid instant gratification. Think long and hard about each purchase you make. Don't think short-term. We should all have major long-term goals that we are working towards.