Last year (while I was busy with my real job) I stuck most of my investments in Vanguard ETFs that I bought through Ameritrade for a one time $9.99 fee. I like ETFs better than index mutual funds because the fees are even lower. VB, VO, VV and VWO were the ones I bought - they cover the broad indexes (VWO is the international play).
Btw, only buy ETFs with limit orders IMHO. They fluctuate on emotion more than a mutual fund does.
My Trader’s Journal