Try winning one of the other victory types. Of course we all have the problem that when you are finishing a Cult/Econ/Tech victory, you end up with some time on your hands while the Victory Wonder or Spaceship is being built. Often, it is hard to resist building a swarm of Tanks and burying the other civs. This is especially true for Econ victory where, by definition, you have 20,000g saved up when you start the World bank.