Last week on the Rule Breaker Investing podcast, Motley Fool co-founder David Gardner reviewed the performance of two sets of his buy-and-hold stock picks: one set with a five-year horizon, and one that he recommended we hold for a year. This week, he offers up a new handful of recommendations, and the theme that came to his mind was Motley Fool Explorer, which is one of the premium services that competitively cherry-picks stocks from the Supernova universe.