Spend less than what you earn and invest. ETFs are a great product for someone who does not have the joy to study the markets.
ROTH IRA. You can trade it all you want and not pay any taxes unless you withdraw from it. But, once you're over 59 1/2, you can withdraw tax free.
Сonsider the length of your retirement. If you plan to retire early, you will need to ensure that your savings will last for a longer period of time. Assuming a moderate lifestyle, a 1.5 million dollar retirement nest egg could provide an annual income of approximately $60,000 to $75,000 per year, assuming a moderate investment return. This may be enough for some retirees, but it may not be sufficient for others depending on their individual circumstances.