Jim Cramer told his first "RealMoney" radio show caller Monday that now is not the time for him to buy more Las Vegas Sands ( LVS). The caller bought the stock in the low-$50s, and the stock is now in the low-$70s. Cramer said that he would take a quarter of his position off the table and lock in a profit. "Word is out that Macau is producing some fabulous returns for the company," Cramer said. "Once the good news is out, we want to be more inclined to sell ... We need to recognize that when other people have heard the good news, it's later than we like." Cramer also said that stocks like Tribune ( TRB) and New York Times ( NYT) are "coiled springs." These stocks have been stuck for a long time at a particular level, and then they suddenly move up, he said. The tendency is to say that they've been stuck and that now they're finally moving higher it's time to ring the register and make some money, Cramer said. But that would be wrong. Once unstuck, Cramer said that Tribune could run higher for 3 or 4 points, so he wouldn't cash in yet. Let it go to $31 or $32, and then move on to better pastures, he said, adding that he likes Internet more than newspaper stocks. A caller said that he had 101 shares of Dominos Pizza ( DPZ), and that he took 25 shares off the table because the stock has moved up significantly. Cramer said that this was the right thing to do, and that he would even be inclined to take another 25 shares off. He mentioned that David A. Brandon, the chief executive of the company, had appeared on his "Mad Money" television show a few weeks ago. During that appearance , " Brandon did a compelling job explaining why the company's long-term forecast could be great," Cramer said.