I segregated a portion I won't need for years, hopefully ever, and put it with Vanguard. As someone said, set it and forget it. I used
Fund Advice sample portfolio for get good diversification.
Then I put the rest with Schwab and concentrate on
their ETFs (commission-free). Works well for me. I also use Schwab for banking, checking, bill pay etc. One nice thing is they refund all ATM charges, even traveling overseas. It makes things simple having everything consolidated in one place.