Nobody likes to see value erased from their portfolios, but taking a page from the playbook of Warren Buffett -- one of the world's most successful investors -- you can focus on the cheap opportunities in the market right now that can set you up for fabulous investing success long term. Lululemon Athletica (NASDAQ: LULU) and Global-e Online (NASDAQ: GLBE) are two great choices. When talking about stocks, cheap typically refers to the valuation rather than the actual price.