https://www.bogleheads.org/wiki/Three-fund_portfolio https://www.bogleheads.org/wiki/Three-fund_portfolio If you prefer a book The Simple Path to Wealth by JL

https://www.bogleheads.org/wiki/Three-fund_portfolio https://www.bogleheads.org/wiki/Three-fund_portfolio If you prefer a book The Simple Path to Wealth by JL Collins is pretty good.