I am a huge fan of index funds. I follow a lot of John Bogle’s principles in investing: simple, automatic, low-cost, diversified. My stock portfolio is in TSP (Thrift Savings Plan, federal/military equivalent of 401K) and Vanguard where I hold Target Retirement funds and VTSAX (US Total Stock Market).
Started investing at age 23 with very minimal contributions then gradually increase with each pay raise.
My target asset allocation is 75% US stocks, 20% Int’l, 5% Bonds.