I can only afford to put maybe one or two hundred bucks into stocks every month. My method so far has been putting at least $50 into VOO and then choosing two or three others to put the rest in (I usually pick between the big ones like AMZM, GOOG, MSFT, JPM, etc). Is this a worthwhile method or should I just stick to VOO, at least until I can afford to put more in at a time?