3 ideas
The biggest threat to a new retiree is sequence-of-returns risk: a crash in the first few years forces selling stocks at low prices, which permanently shrinks the portfolio. In a down year, live off that cash instead of selling equities, and refill it only after the market recovers.
Home ownership's real cost is far more than the mortgage. It includes property tax, maintenance, insurance, transaction fees, and the opportunity cost of a down payment that could have compounded in index funds. When a city's home prices are high relative to its rents, renting and investing the difference builds more wealth than buying, so the choice should come from the numbers, not from the cultural belief that renting is throwing money away.
In the first years after quitting, tilt the portfolio toward higher-yielding assets such as dividend stocks, preferred shares, REITs, and bonds. This shields the principal while it is most vulnerable, and you shift back to a plain index portfolio once the early-retirement danger window has passed.