When I search for stocks, I look for companies that are resilient. The kind that won't get too beaten up when the market goes south and which can tough it out when needed, the kind that has the tools to grow when times are tough.In football, that quality is shown when players play through the pain of an injury. Terrell Owens did it when he was playing for the Eagles in the Super Bowl. He is a game-changer, and he fought through a serious injury to make a positive impact for his team, although the Eagles ultimately lost. Last Sunday, Cowboys quarterback Tony Romo broke the pinkie finger on his throwing hand, which is extremely important to his ability to pass. He hurt it in overtime in last week's loss against the Cardinals. After a phone call from Brett Favre, who is known for his consecutive starting streak and playing through injuries, Romo decided he may try and tough it out if he is physically able to play. While this not a broken leg like Owens' injury, Romo is showing that he will do what it takes and not let an injury knock him out of the game. Now, the decision is ultimately up to coach Wade Phillips. Backup Brad Johnson may end up starting Sunday, but either way, Romo's resilience is impressive. A company that I believe is primed to weather a difficult market is Costco ( COST), the membership warehouse. You know, the place where you can buy tons of your favorite snacks in bulk. It has a lot more than just that. The place sells candy, tobacco, alcoholic and non-alcoholic drinks, computer and video equipment, cleaning supplies, furniture, dinner foods, apparel and much more. People flock to these stores, and every time I shop there, the lines at the checkout are always nuts.