The S&P 500 is up 25% this year and continues to hit new highs. It's a time of confidence in the economy and excitement in the future. However, it means that it's getting harder to find great deals in the market. As the market goes higher, valuations are starting to look inflated.Warren Buffett recently reiterated his approach to investing as saying that he buys wonderful businesses at fair prices instead of fair businesses at wonderful prices. Investors should take heed and find those excellent businesses ...