Not to blow my own trumpet but the [HP CPU Assassin](https://superuser.com/questions/240794/why-does-wmi-provider-host-wmiprvse-exe-keep-spiking-my-cpu) (thanks @nhinkle for the title) and [Browser Addon to filter Google search results](https://superuser.com/questions/245959/is-there-a-browser-addon-to-filter-google-search-results) are both good.