Since I already have my tax advantaged accounts (401K/Roth/Backdoor 401K) maxed out, and found myself with extra cash, I just put 80K into a vanguard taxable account. Since I could possibly need this $ in the near future (home down payment, maybe?), I put 30% in bonds (VBTLX) and 70% in stocks. For the stocks, I split that out 80/20 in VTSAX and VTIAX (international stock index). Someone here countered that you already have some international exposure in VTSAX, but I decided to split it out, anyway.